SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by V K Agarw » Sat, 01 Dec 2001 18:47:16



Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
I thought 6225 & 6230 are adapter type 4-P, so I should be able to
use. But friend of mine is stating that 6225 will not work on IBM
RS/6000 P660 (Model 6H1) ?

BTW, what is the difference between 6225 & 6230 ?

EnjoyAIX,
VK

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by Uwe Aue » Sat, 01 Dec 2001 21:19:51



> Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> use. But friend of mine is stating that 6225 will not work on IBM
> RS/6000 P660 (Model 6H1) ?

> BTW, what is the difference between 6225 & 6230 ?

> EnjoyAIX,
> VK

Hi,

your friend is right. 6225 Adapter is not on supported adapter list of
P666-6H1.
For differences, please check features:

Here are the feature for 6230:
==============================
AIX: 4.2.1, 4.3.2 or above
    RAID support:
        Non-RAID, 0, 1, 5, 10.
    Option 32MB Fast-Write Cache: improves performance
        with RAID 5, RAID-10 and non-RAID applications.
    Initiators:
        Non-RAID = 8
        RAID-0 = 1
        RAID-1 with Fast-Write option = 2
        RAID-5 with Fast-Write option = 2
        RAID-10 with Fast-Write option = 2
    Number of disks:
        2-16 per RAID-0 Array.
        2 per RAID-1 Array.
        3-16 per RAID-5 Array.
        4-16 per RAID-10 Array (in pairs)
    Bus width: 32
    Busmaster: Yes
    Adapter Type: Long
    Data transfer rate: 20MB/40MB SSA link speed
        automatically negociated
    7133-D40/T40 require enclosure microcode level
   >=11
    Loops: 2
    Max disks/loop: 48
    Adapter Compatibility: 4M, 4N and 4P (Note 1)
    Hot Spare: Yes
    Fast Write Cache Option: 32MB
    RAID/Spares Span Loops: No.
    Boot Support: Non-RAID disk via NIM installation
    Dump tool: Requires Hot Spar

Here are the feature of 6225:
=============================

Specs:

    AIX: 4.2.1, 4.3.0
    8 initiators Non-RAID / 2 initiators RAID-5
    From 3 to 16 drives per RAID Array.
    Bus width: 32
    Busmaster: Yes
    Adapter Type: Long
    Data transfer rate: 20MB/40MB SSA link speed
        automatically negociated
    Loops: 2
    Max disks/loop: 48
    Adapter Compatibility: 4M, 4N and 4P (Note 1)
    RAID support:
        RAID 0, RAID 5 Fast-Write Cache and Non-RAID
        Single Adapter - RAID 5 with Fast/Write cache.
        Single Adapter - RAID 0.
        Two Adapters - RAID 5 and Non Fast/Write.
    Hot Spare: Yes
    Fast Write Cache Option: 32MB
    RAID/Spares Span Loops: No.
    Boot Support: No.
    Dump tool: Requires Hot Spare

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by V K Agarw » Sun, 02 Dec 2001 18:37:12




> > Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> > I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> > use. But friend of mine is stating that 6225 will not work on IBM
> > RS/6000 P660 (Model 6H1) ?

> > BTW, what is the difference between 6225 & 6230 ?

> > EnjoyAIX,
> > VK

> Hi,

> your friend is right. 6225 Adapter is not on supported adapter list of
> P666-6H1.
> For differences, please check features:

> Here are the feature for 6230:
> ==============================
> AIX: 4.2.1, 4.3.2 or above
>     RAID support:
>         Non-RAID, 0, 1, 5, 10.
>     Option 32MB Fast-Write Cache: improves performance
>         with RAID 5, RAID-10 and non-RAID applications.
>     Initiators:
>         Non-RAID = 8
>         RAID-0 = 1
>         RAID-1 with Fast-Write option = 2
>         RAID-5 with Fast-Write option = 2
>         RAID-10 with Fast-Write option = 2
>     Number of disks:
>         2-16 per RAID-0 Array.
>         2 per RAID-1 Array.
>         3-16 per RAID-5 Array.
>         4-16 per RAID-10 Array (in pairs)
>     Bus width: 32
>     Busmaster: Yes
>     Adapter Type: Long
>     Data transfer rate: 20MB/40MB SSA link speed
>         automatically negociated
>     7133-D40/T40 require enclosure microcode level
>    >=11
>     Loops: 2
>     Max disks/loop: 48
>     Adapter Compatibility: 4M, 4N and 4P (Note 1)
>     Hot Spare: Yes
>     Fast Write Cache Option: 32MB
>     RAID/Spares Span Loops: No.
>     Boot Support: Non-RAID disk via NIM installation
>     Dump tool: Requires Hot Spar

> Here are the feature of 6225:
> =============================

> Specs:

>     AIX: 4.2.1, 4.3.0
>     8 initiators Non-RAID / 2 initiators RAID-5
>     From 3 to 16 drives per RAID Array.
>     Bus width: 32
>     Busmaster: Yes
>     Adapter Type: Long
>     Data transfer rate: 20MB/40MB SSA link speed
>         automatically negociated
>     Loops: 2
>     Max disks/loop: 48
>     Adapter Compatibility: 4M, 4N and 4P (Note 1)
>     RAID support:
>         RAID 0, RAID 5 Fast-Write Cache and Non-RAID
>         Single Adapter - RAID 5 with Fast/Write cache.
>         Single Adapter - RAID 0.
>         Two Adapters - RAID 5 and Non Fast/Write.
>     Hot Spare: Yes
>     Fast Write Cache Option: 32MB
>     RAID/Spares Span Loops: No.
>     Boot Support: No.
>     Dump tool: Requires Hot Spare

Hi Uwe Auer,

Thanks for information. Where and how do you get such information?. I
looked at IBM Adapters book, therefore I was discussing with him.

EnjoyAIX,
VK

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by Dudema » Wed, 05 Dec 2001 03:40:56


VK,

A 6230 is the same card as a 6225, but with a free "field" upgrade via
microcode.

Check with your local CE to have him/her upgrade the card for you.

Microcode and instructions are at:

http://www.storage.ibm.com/hardsoft/products/ssa/rs6k/index.html

If you are brave enough to do it on your own, make sure you read the
instructions on the IBM website, and the microcode readme's instructions
carefully....

We have successfully upgraded all of our 6225 to 6230 with no problem.

Tips: Unmount filesystems, de-activate paging spaces, and varyoffvg, then
de-Stage and and all fast-write cache on all adapters before attempting any
microcode upgrade.

-D.



Quote:> Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> use. But friend of mine is stating that 6225 will not work on IBM
> RS/6000 P660 (Model 6H1) ?

> BTW, what is the difference between 6225 & 6230 ?

> EnjoyAIX,
> VK

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by V K Agarw » Wed, 05 Dec 2001 12:46:48



> VK,

> A 6230 is the same card as a 6225, but with a free "field" upgrade via
> microcode.

> Check with your local CE to have him/her upgrade the card for you.

> Microcode and instructions are at:

> http://www.storage.ibm.com/hardsoft/products/ssa/rs6k/index.html

> If you are brave enough to do it on your own, make sure you read the
> instructions on the IBM website, and the microcode readme's instructions
> carefully....

> We have successfully upgraded all of our 6225 to 6230 with no problem.

> Tips: Unmount filesystems, de-activate paging spaces, and varyoffvg, then
> de-Stage and and all fast-write cache on all adapters before attempting any
> microcode upgrade.

> -D.



> > Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> > I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> > use. But friend of mine is stating that 6225 will not work on IBM
> > RS/6000 P660 (Model 6H1) ?

> > BTW, what is the difference between 6225 & 6230 ?

> > EnjoyAIX,
> > VK

Dear Dudeman,
Thanks a LOT, surely this will *save* approx. US$20,000 for our SP2
Nodes, F50s and 43Ps. Special thanks for Tips!

What do you mean by 'de-Stage' ?
I can take care for varyofvg for 'user defined Volume Groups' , I have
to take care for rootvg and standard paging space (hd6)?

With Warm Regards,
VK

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by Dudema » Thu, 06 Dec 2001 00:01:49


VK,

First - the varyoffvg I spoke of only applies to VG's on SSA drives
utilizing the "SSA Fast-Write Cache" feature, so if your rootvg is not on
SSA, or is but does not have the fast-write" feature turned on, then you
should be ok - please see the rest of the post before you do anything....

If you have the "fast write cache" option card installed on your SSA adapter
(FC 6235) and have the fast-write feature turned on for any drives, you must
turn it off before you attempt any upgrade of the firmware, or risk the loss
of data.

To view/change fast-write settings for drives, use "smitty ssafastw".

If you have RAID arrays, you can only turn fast-write on/off for the whole
array hdisk, if you use straight hdisk/pdisk as system drives, then it
operates on each hdisk individually.

Tip - you can always turn fast-write ON for a drive at any time, but to turn
it OFF is a more lengthy process as described in my earlier post...  It only
becomes a real pain when there is paging on the "fast-writed" device, and
you need to reboot to de-activate the paging....

FYI - if you have the SSA card out of the machine, you can easily see if you
have the H/W feature - it looks like a standard PCMCIA card inserted on the
SSA Card - it has warnings about customer data, battery backed
data....etc...

If there is an empty PCMCIA card slot on the card, then you don't have the
option, and don't worry about the fast-write....

If you want to check the individual cards to see if they have the fast-write
card installed, you can do a lscfg -vl sssX, and look for the Z1 field (or
whatever shows the "cache= line").  Like this:

lscfg -vl ssa0
  DEVICE            LOCATION          DESCRIPTION

  ssa0              1A-08             IBM SSA 160 SerialRAID Adapter
                                      (14109100)

        Part Number................. 09L5695
        FRU Number.................. 34L5388
        Serial Number...............S0270160
        EC Level....................    F23699
        Manufacturer................IBM053
        ROS Level and ID............8300    0000
        Loadable Microcode Level....05
        Device Driver Level.........00
        Displayable Message.........SSA-ADAPTER
        Device Specific.(Z0)........SDRAM=128
        Device Specific.(Z1)........CACHE=32
<========================
        Device Specific.(Z2)........UID=006094BE0000EA18
        Device Specific.(YL)........P1-I3/Q1

If you were wondering about the Z0 SDRAM line, then this is the scoop -
normal cards with no Fast-write come with 64MB SDRAM.  If you ever want to
use the Fast-write option card, *AND* you are going loop drives into 2
adapters (dual initiator) for redundancy, then you need the 128MB option (FC
6231) otherwise you will only be able to use 16MB of the 32MB Fastwrite, and
you will get "SSA Performance Degraded" error messages in the error report
for ever.  Moral:  If you do redundant loops w/Fast-Write, spring for the
extra DRAM.

FYI...The adapter above is a 6230 by purchase, but as you can see the
firmware also needs to be updated (ROS Level and ID - 8300 is old, AB00 is
the latest I believe)....shame on me.

I hope this helps.

P.S. - http://www.ibmlink.ibm.com/ussman - look up a 7026, 7017, etc... Look
for Feature codes 6230, 6231, and 6235.

Also check the SSA card manuals on:

http://www.storage.ibm.com/hardsoft/products/ssa/docs/index.html

http://www.storage.ibm.com/hardsoft/products/ssa/docs/sc2_inst.html - this
is the SerialRAID Adapters install guide - check page 1, chapter 1 for an
intro to Fast-Write.....

Happy upgrading....
-D.




> > VK,

> > A 6230 is the same card as a 6225, but with a free "field" upgrade via
> > microcode.

> > Check with your local CE to have him/her upgrade the card for you.

> > Microcode and instructions are at:

> > http://www.storage.ibm.com/hardsoft/products/ssa/rs6k/index.html

> > If you are brave enough to do it on your own, make sure you read the
> > instructions on the IBM website, and the microcode readme's instructions
> > carefully....

> > We have successfully upgraded all of our 6225 to 6230 with no problem.

> > Tips: Unmount filesystems, de-activate paging spaces, and varyoffvg,
then
> > de-Stage and and all fast-write cache on all adapters before attempting
any
> > microcode upgrade.

> > -D.



> > > Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> > > I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> > > use. But friend of mine is stating that 6225 will not work on IBM
> > > RS/6000 P660 (Model 6H1) ?

> > > BTW, what is the difference between 6225 & 6230 ?

> > > EnjoyAIX,
> > > VK

> Dear Dudeman,
> Thanks a LOT, surely this will *save* approx. US$20,000 for our SP2
> Nodes, F50s and 43Ps. Special thanks for Tips!

> What do you mean by 'de-Stage' ?
> I can take care for varyofvg for 'user defined Volume Groups' , I have
> to take care for rootvg and standard paging space (hd6)?

> With Warm Regards,
> VK

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by V K Agarw » Fri, 07 Dec 2001 14:37:04



> VK,

> First - the varyoffvg I spoke of only applies to VG's on SSA drives
> utilizing the "SSA Fast-Write Cache" feature, so if your rootvg is not on
> SSA, or is but does not have the fast-write" feature turned on, then you
> should be ok - please see the rest of the post before you do anything....

> If you have the "fast write cache" option card installed on your SSA adapter
> (FC 6235) and have the fast-write feature turned on for any drives, you must
> turn it off before you attempt any upgrade of the firmware, or risk the loss
> of data.

> To view/change fast-write settings for drives, use "smitty ssafastw".

> If you have RAID arrays, you can only turn fast-write on/off for the whole
> array hdisk, if you use straight hdisk/pdisk as system drives, then it
> operates on each hdisk individually.

> Tip - you can always turn fast-write ON for a drive at any time, but to turn
> it OFF is a more lengthy process as described in my earlier post...  It only
> becomes a real pain when there is paging on the "fast-writed" device, and
> you need to reboot to de-activate the paging....

> FYI - if you have the SSA card out of the machine, you can easily see if you
> have the H/W feature - it looks like a standard PCMCIA card inserted on the
> SSA Card - it has warnings about customer data, battery backed
> data....etc...

> If there is an empty PCMCIA card slot on the card, then you don't have the
> option, and don't worry about the fast-write....

> If you want to check the individual cards to see if they have the fast-write
> card installed, you can do a lscfg -vl sssX, and look for the Z1 field (or
> whatever shows the "cache= line").  Like this:

> lscfg -vl ssa0
>   DEVICE            LOCATION          DESCRIPTION

>   ssa0              1A-08             IBM SSA 160 SerialRAID Adapter
>                                       (14109100)

>         Part Number................. 09L5695
>         FRU Number.................. 34L5388
>         Serial Number...............S0270160
>         EC Level....................    F23699
>         Manufacturer................IBM053
>         ROS Level and ID............8300    0000
>         Loadable Microcode Level....05
>         Device Driver Level.........00
>         Displayable Message.........SSA-ADAPTER
>         Device Specific.(Z0)........SDRAM=128
>         Device Specific.(Z1)........CACHE=32
> <========================
>         Device Specific.(Z2)........UID=006094BE0000EA18
>         Device Specific.(YL)........P1-I3/Q1

> If you were wondering about the Z0 SDRAM line, then this is the scoop -
> normal cards with no Fast-write come with 64MB SDRAM.  If you ever want to
> use the Fast-write option card, *AND* you are going loop drives into 2
> adapters (dual initiator) for redundancy, then you need the 128MB option (FC
> 6231) otherwise you will only be able to use 16MB of the 32MB Fastwrite, and
> you will get "SSA Performance Degraded" error messages in the error report
> for ever.  Moral:  If you do redundant loops w/Fast-Write, spring for the
> extra DRAM.

> FYI...The adapter above is a 6230 by purchase, but as you can see the
> firmware also needs to be updated (ROS Level and ID - 8300 is old, AB00 is
> the latest I believe)....shame on me.

> I hope this helps.

> P.S. - http://www.ibmlink.ibm.com/ussman - look up a 7026, 7017, etc... Look
> for Feature codes 6230, 6231, and 6235.

> Also check the SSA card manuals on:

> http://www.storage.ibm.com/hardsoft/products/ssa/docs/index.html

> http://www.storage.ibm.com/hardsoft/products/ssa/docs/sc2_inst.html - this
> is the SerialRAID Adapters install guide - check page 1, chapter 1 for an
> intro to Fast-Write.....

> Happy upgrading....
> -D.





> > > VK,

> > > A 6230 is the same card as a 6225, but with a free "field" upgrade via
> > > microcode.

> > > Check with your local CE to have him/her upgrade the card for you.

> > > Microcode and instructions are at:

> > > http://www.storage.ibm.com/hardsoft/products/ssa/rs6k/index.html

> > > If you are brave enough to do it on your own, make sure you read the
> > > instructions on the IBM website, and the microcode readme's instructions
> > > carefully....

> > > We have successfully upgraded all of our 6225 to 6230 with no problem.

> > > Tips: Unmount filesystems, de-activate paging spaces, and varyoffvg,
>  then
> > > de-Stage and and all fast-write cache on all adapters before attempting
>  any
> > > microcode upgrade.

> > > -D.



> > > > Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> > > > I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> > > > use. But friend of mine is stating that 6225 will not work on IBM
> > > > RS/6000 P660 (Model 6H1) ?

> > > > BTW, what is the difference between 6225 & 6230 ?

> > > > EnjoyAIX,
> > > > VK

> > Dear Dudeman,
> > Thanks a LOT, surely this will *save* approx. US$20,000 for our SP2
> > Nodes, F50s and 43Ps. Special thanks for Tips!

> > What do you mean by 'de-Stage' ?
> > I can take care for varyofvg for 'user defined Volume Groups' , I have
> > to take care for rootvg and standard paging space (hd6)?

> > With Warm Regards,
> > VK

Dear Dudeman,
Again Thanks, at this stage all I can say ,If you wish to visit Dubai
, the "City Of Gold". IOU please contact me on +9714 301 2183 and I
will take you to 'Desert Safari'

V K Agarwal
Dubai Petroleum Company
SAP R/3 Support (AIX, DB2/UDB , R/3)

 
 
 

SSA Adapter 4-P (6225 & 6230) on RS/6000 P660

Post by Dudema » Sat, 08 Dec 2001 01:16:57


V K,

If I ever have occasion to be near Dubai I will certainly give you a call.
Good luck with your upgrades, please let me know how everything turns out.

Thanks,
-D.




> > VK,

> > First - the varyoffvg I spoke of only applies to VG's on SSA drives
> > utilizing the "SSA Fast-Write Cache" feature, so if your rootvg is not
on
> > SSA, or is but does not have the fast-write" feature turned on, then you
> > should be ok - please see the rest of the post before you do
anything....

> > If you have the "fast write cache" option card installed on your SSA
adapter
> > (FC 6235) and have the fast-write feature turned on for any drives, you
must
> > turn it off before you attempt any upgrade of the firmware, or risk the
loss
> > of data.

> > To view/change fast-write settings for drives, use "smitty ssafastw".

> > If you have RAID arrays, you can only turn fast-write on/off for the
whole
> > array hdisk, if you use straight hdisk/pdisk as system drives, then it
> > operates on each hdisk individually.

> > Tip - you can always turn fast-write ON for a drive at any time, but to
turn
> > it OFF is a more lengthy process as described in my earlier post...  It
only
> > becomes a real pain when there is paging on the "fast-writed" device,
and
> > you need to reboot to de-activate the paging....

> > FYI - if you have the SSA card out of the machine, you can easily see if
you
> > have the H/W feature - it looks like a standard PCMCIA card inserted on
the
> > SSA Card - it has warnings about customer data, battery backed
> > data....etc...

> > If there is an empty PCMCIA card slot on the card, then you don't have
the
> > option, and don't worry about the fast-write....

> > If you want to check the individual cards to see if they have the
fast-write
> > card installed, you can do a lscfg -vl sssX, and look for the Z1 field
(or
> > whatever shows the "cache= line").  Like this:

> > lscfg -vl ssa0
> >   DEVICE            LOCATION          DESCRIPTION

> >   ssa0              1A-08             IBM SSA 160 SerialRAID Adapter
> >                                       (14109100)

> >         Part Number................. 09L5695
> >         FRU Number.................. 34L5388
> >         Serial Number...............S0270160
> >         EC Level....................    F23699
> >         Manufacturer................IBM053
> >         ROS Level and ID............8300    0000
> >         Loadable Microcode Level....05
> >         Device Driver Level.........00
> >         Displayable Message.........SSA-ADAPTER
> >         Device Specific.(Z0)........SDRAM=128
> >         Device Specific.(Z1)........CACHE=32
> > <========================
> >         Device Specific.(Z2)........UID=006094BE0000EA18
> >         Device Specific.(YL)........P1-I3/Q1

> > If you were wondering about the Z0 SDRAM line, then this is the scoop -
> > normal cards with no Fast-write come with 64MB SDRAM.  If you ever want
to
> > use the Fast-write option card, *AND* you are going loop drives into 2
> > adapters (dual initiator) for redundancy, then you need the 128MB option
(FC
> > 6231) otherwise you will only be able to use 16MB of the 32MB Fastwrite,
and
> > you will get "SSA Performance Degraded" error messages in the error
report
> > for ever.  Moral:  If you do redundant loops w/Fast-Write, spring for
the
> > extra DRAM.

> > FYI...The adapter above is a 6230 by purchase, but as you can see the
> > firmware also needs to be updated (ROS Level and ID - 8300 is old, AB00
is
> > the latest I believe)....shame on me.

> > I hope this helps.

> > P.S. - http://www.ibmlink.ibm.com/ussman - look up a 7026, 7017, etc...
Look
> > for Feature codes 6230, 6231, and 6235.

> > Also check the SSA card manuals on:

> > http://www.storage.ibm.com/hardsoft/products/ssa/docs/index.html

> > http://www.storage.ibm.com/hardsoft/products/ssa/docs/sc2_inst.html -
this
> > is the SerialRAID Adapters install guide - check page 1, chapter 1 for
an
> > intro to Fast-Write.....

> > Happy upgrading....
> > -D.





> > > > VK,

> > > > A 6230 is the same card as a 6225, but with a free "field" upgrade
via
> > > > microcode.

> > > > Check with your local CE to have him/her upgrade the card for you.

> > > > Microcode and instructions are at:

> > > > http://www.storage.ibm.com/hardsoft/products/ssa/rs6k/index.html

> > > > If you are brave enough to do it on your own, make sure you read the
> > > > instructions on the IBM website, and the microcode readme's
instructions
> > > > carefully....

> > > > We have successfully upgraded all of our 6225 to 6230 with no
problem.

> > > > Tips: Unmount filesystems, de-activate paging spaces, and varyoffvg,
> >  then
> > > > de-Stage and and all fast-write cache on all adapters before
attempting
> >  any
> > > > microcode upgrade.

> > > > -D.



> > > > > Can I use SSA Adapter 6225 on IBM RS/6000 P660 (Model 6H1) ?
> > > > > I thought 6225 & 6230 are adapter type 4-P, so I should be able to
> > > > > use. But friend of mine is stating that 6225 will not work on IBM
> > > > > RS/6000 P660 (Model 6H1) ?

> > > > > BTW, what is the difference between 6225 & 6230 ?

> > > > > EnjoyAIX,
> > > > > VK

> > > Dear Dudeman,
> > > Thanks a LOT, surely this will *save* approx. US$20,000 for our SP2
> > > Nodes, F50s and 43Ps. Special thanks for Tips!

> > > What do you mean by 'de-Stage' ?
> > > I can take care for varyofvg for 'user defined Volume Groups' , I have
> > > to take care for rootvg and standard paging space (hd6)?

> > > With Warm Regards,
> > > VK

> Dear Dudeman,
> Again Thanks, at this stage all I can say ,If you wish to visit Dubai
> , the "City Of Gold". IOU please contact me on +9714 301 2183 and I
> will take you to 'Desert Safari'

> V K Agarwal
> Dubai Petroleum Company
> SAP R/3 Support (AIX, DB2/UDB , R/3)

 
 
 

1. 4-P Advance SerialRAID Adapters (FC 6225, 6231 & 6235)

ssa1              30-68             IBM SSA 160 SerialRAID Adapter
                                    (14109100)                    

      Part Number................. 09L5693                        
      FRU Number.................. 09L2090                        
      Serial Number...............S9320072                        
      EC Level....................    F24713                      
      Manufacturer................IBM053                          
      ROS Level and ID............7600    0000                    
      Loadable Microcode Level....05                              
      Device Driver Level.........00                              
      Displayable Message.........SSA-ADAPTER                      
      Device Specific.(Z0)........SDRAM=064                        
      Device Specific.(Z1)........CACHE=00                        
      Device Specific.(Z2)........UID=000008005AEB85B2            
      Device Specific.(YL)........P2-I7      

Friends,

I have this SSA adapter (FC 6225) on RS/6000 F50 with AIX 4.3.2
to connect SSA Disk sub system (7133-T40) in RAID5 environment
thru SSA adapter 6225.

To improve system performance (to reduce I/O wait time), Have I to:

(1) Only install FC 6231 [128 MB DRAM Option card]
Or
(2) Only install FC 6235 [Advance SerialRAID Adapter Fast-Write Cache
              Option Card ]
or
(3) Install Both FC 6231 AND FC 6235

By the way, What is the role and benefit of FC 6231
( I looked from page 90 to 93 of type 4-P in SA38-0516-10, but
could not make out the what would be the benefits of FC 6231)

Good it reminds me my IBM3174 configuration days :)

Thanks,

VK

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