best 1 gig drive ?

best 1 gig drive ?

Post by little blue bo » Tue, 30 Jan 1996 04:00:00



I am looking for a new HD for my sun IPC. The only requirements that I have
right now is that it be relatively cheap, and around 1 gig in total size,
and that it fit in my 3.5" slot in my IPC. Any suggestions/horror stories?

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| atari 2600/7800, intellevision, nes, Sun 3/50 and IPC, Linux 486 DX2/66 |

 
 
 

best 1 gig drive ?

Post by Syed Zaeem Hosa » Tue, 30 Jan 1996 04:00:00



Quote:>I am looking for a new HD for my sun IPC. The only requirements that I have
>right now is that it be relatively cheap, and around 1 gig in total size,
>and that it fit in my 3.5" slot in my IPC. Any suggestions/horror stories?

This is from a post I made a few years ago for 1GB drives. The info may
be a bit out of date at this point, but all these mftrs are good ... so
their latest 1GB models may be just fine for you:

1. HP C2247S, 1.05GB, 10.5ms

Nice fast drive, but noisier than the others. Physically vibrates more
than the others. When I had one in my IPX sitting on my desk here, the
physical hum actually started numbing my hand resting on the table
while I typed. A wrist pad did not solve the problem - so I switched
drives (to a modified DEC 3105) and am much happier! This issue may not
matter for a server. I would trust HP for long-term reliability.

2. Micropolis M2112, 1.05 GB, 10 ms

Unreliable. I have had atrocious failure rates with this model (one
time 7 out of 10 failed in one batch in 1992). I contacted the vendor and
Micropolis finally admitted to a manufacturing problem. I replaced all
the failed Micropolis drives with modified DEC DSP 3105's and have had
no problems since. This

(Note: this drive has seen been replaced by a newer unit called the
2117, I think - which may be better. I have not tried it).

3. DEC DSP3105, 1.05GB, 10 ms

Best of the bunch (although the 3107 may be as good or better - I have
no experience with it). Nice fast drive. Slightly noisy while seeking,
but has the best shock mounting, and thus the lowest physical vibration
characteristics. I tried the HP, Micropolis and DEC drives in my IPX
(that I am typing from here), and settled on the DEC.

Track-to-track seek time (1ms) is the best of the ones you mention
here. This drive also dissipates more power than the others, which
makes it run a little hotter, but I have had one in continuous use for
about 10 months (now 2.5 years) in an IPX without a single problem! In
a Sparc 2 or 10 with better ventilation, this should be less of an
issue.

(Actually, I use a slightly modified DEC drive, called a R.A.R.E 3105.
This company modifies the cache algorithm on the 3105 for improved
performance - I get 2.2Mbytes/sec using the 'dd if=/dev/rsd1xx
of=/dev/null bs=10240' and `iostat -d' measurement technique on an
IPX.  Not bad at all!)

4. IBM (no exact ID ...), formatted 1GB, < 10 ms

Depending on which IBM drive you get, you may find that it is
physically non-standard in length and *may* not fit inside the Sun
cabinet. While I personally do not have any experience about this, I
have received e-mail from people who did, so beware. IBM has the
tendency to "go their own way" with regards to industry standards ...

Other Comments:

FWIW, I do not consider the Seagate 11200 to be the best one around,
and the fact that Sun chose them is more the fact that they have had
a long-term working OEM agreement with them than anything else (IMHO).
But it is certainly a reasonable drive.

Summary:

Recommend:

        DEC DSP3105 and 3107.
        HP C2247.
        Fujitsu 2694 (seemed slower than others, but may work well).

Neutral on:

        Seagate 11200 (this is what Sun used to use pretty extensively).
        Connor (do not know model number - 1" high drive). These are
                lower power than other models and should do well.

No knowledge:

        Maxtor (no experience with this drive).
        Toshiba (although I have heard of reliability problems).
        IBM (potential physical size limitation - beware of model purchased).

Avoid:

        Micropolis 2112 (old model now discontinued - new model 2117 and
                its replacement may be okay).

                                                                Z

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best 1 gig drive ?

Post by Luc I. Sur » Wed, 31 Jan 1996 04:00:00



: I am looking for a new HD for my sun IPC. The only requirements that I have
: right now is that it be relatively cheap, and around 1 gig in total size,
: and that it fit in my 3.5" slot in my IPC. Any suggestions/horror stories?

Hi,

Well after looking for a while, we are now using the following disk in
all our Sparcs/Sun's. One of the reason is that it is Sun compatible.
Hooked it, format and go, no problems ;-)

Type:
        IBM OEM Pegasus DPES 31080
        Capa: 1.1GB RPM: 5400
        Price: around $400
        (that is at least what we paying them here in Holland)

Tested:
        SLC / ELC / IPX / SS2 / Sun4/110 / Sun4/280

OS:
        SunOS 4.1.4 , Solaris 2.4 , Solaris 2.5
Note:
        check the terminations
        it come with a entry for format.dat, but we never used it.
--
Kind regards,
Luc
________________________________________________________________________________
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best 1 gig drive ?

Post by Terry Brown-SunServi » Wed, 31 Jan 1996 04:00:00


the seagate is prefered by almost all my customer base because
of high reliability (mtbfr), and these suckers run cool.
try putting 2 dec drives internal in a sparc 10 or whatever.
you would be better off using them in an external case IMHO

.                     |
+=========================================================================+

 
 
 

best 1 gig drive ?

Post by JCarr378 » Wed, 31 Jan 1996 04:00:00


the fujitsu 1.2 gig scsi 2 drive is 5400 rpm, and 512 k cache, seems to be
fine. one inch high. we sell it preformatted on sun for $299

Powerstar Inc.                                                  SCSI-3,
UPS Technologies
800-209-5556

 
 
 

best 1 gig drive ?

Post by Mike Fris » Thu, 01 Feb 1996 04:00:00




Quote:>    IBM OEM Pegasus DPES 31080
>    Capa: 1.1GB RPM: 5400
>    Price: around $400
>    (that is at least what we paying them here in Holland)

        We put a pair of these drives in our NT server at the office and
they've worked flawlessly.  They're definitely not the fastest drive out
there, but we're able to get these for $300 CDN when they're in stock.  
Knowing that they'll work on a Sun is even better because that will be the
next drive in my Sparc.

Thanks for the info!

Mike.

======================================================================

Northstar Technologies                 WWW: http://www.io.org/~mfrisch
Newmarket, Ontario, CANADA                      Compuserve: 76620,2534

 
 
 

best 1 gig drive ?

Post by Luc I. Sur » Fri, 02 Feb 1996 04:00:00




: >  IBM OEM Pegasus DPES 31080
: >  Capa: 1.1GB RPM: 5400
: >  Price: around $400
: >  (that is at least what we paying them here in Holland)

:       We put a pair of these drives in our NT server at the office and
: they've worked flawlessly.  They're definitely not the fastest drive out
: there, but we're able to get these for $300 CDN when they're in stock.  
: Knowing that they'll work on a Sun is even better because that will be the
: next drive in my Sparc.

: Thanks for the info!
Your welcome.
Keep in mind that they come with termination ON (jumpered), so
you may need to check that as well.

--
Kind regards,
Luc
______________________________________________________________________________
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best 1 gig drive ?

Post by Michael Joost » Fri, 02 Feb 1996 04:00:00




> Newsgroups: comp.sys.sun.hardware
> Date: 30 Jan 1996 14:27:07 GMT
> Organization: Motorola Semiconductor Products Sector

> the seagate is prefered by almost all my customer base because
> of high reliability (mtbfr), and these suckers run cool.
> try putting 2 dec drives internal in a sparc 10 or whatever.
> you would be better off using them in an external case IMHO


High what? Hope you don't mean the 11200 or 12400 or Barracudas... Mots of
them didn't last longer than a year or two. I can only hope that the 31230 now
is more mature - since this one is just sitting in my Indigo...

Michael

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best 1 gig drive ?

Post by JCarr378 » Fri, 02 Feb 1996 04:00:00


THE FUJISTSU 1 .2 gig scsi2 disk is the best we have seen because:
1. they never seeem to fail
2. 512 k cache
3. 5400rpm
4. 1 inch high
5. multi-year warranty
6. we sell them for $285

Powerstar Inc.                                                  SCSI-3,
UPS Technologies
800-209-5556

 
 
 

best 1 gig drive ?

Post by C. T. Nadovi » Mon, 05 Feb 1996 04:00:00



Quote:>Avoid:
>    Micropolis 2112 (old model now discontinued - new model 2117 and
>            its replacement may be okay).

I have a 2117 on a news machine. It gets beat on pretty bad (you know
news machines). It still works great. Been up about a year with no
crashes. Yeah Linux! :)
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+1 215 257 0635 (voice)                        +1 215 257 2744 (data/fax)
 
 
 

best 1 gig drive ?

Post by JCarr378 » Tue, 06 Feb 1996 04:00:00


we find the fujitsu 1606 to be the fastest, and most reliable 1 gig.  do
not buy the seagate barracuda one gig drive, disaster

Powerstar Inc.                                                  SCSI-3,
UPS Technologies
800-209-5556

 
 
 

best 1 gig drive ?

Post by Klaus ter Fe » Thu, 08 Feb 1996 04:00:00





> >       IBM OEM Pegasus DPES 31080
> >       Capa: 1.1GB RPM: 5400
> >       Price: around $400
> >       (that is at least what we paying them here in Holland)
>    We put a pair of these drives in our NT server at the office and
> they've worked flawlessly.  They're definitely not the fastest drive out
> there, but we're able to get these for $300 CDN when they're in stock.  
> Knowing that they'll work on a Sun is even better because that will be the
> next drive in my Sparc.

Well, I'm running tree of those disks in my SS2s - running fine. But one
Question remains unsolved: Jumper 6 on  the  Disk  enables/disables  "TI
sync negotiation". Could someone explain how I should  set  this  jumper
for a Sparc 2 and why? (Currently I have disabled this  feature  on  all
disks.)
--

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best 1 gig drive ?

Post by Luc I. Sur » Sun, 11 Feb 1996 04:00:00


Klaus ter Fehn (k...@bc3.gun.de) wrote:
: Mike Frisch (mfri...@saturn.tlug.org) wrote:
: > In article <4elh08$...@white.patriot.nl>,
: >    LucSu...@patriot.nl (Luc I. Suryo) wrote:
: > >     IBM OEM Pegasus DPES 31080
: > >     Capa: 1.1GB RPM: 5400
: > >     Price: around $400
: > >     (that is at least what we paying them here in Holland)

: >  We put a pair of these drives in our NT server at the office and
: > they've worked flawlessly.  They're definitely not the fastest drive out
: > there, but we're able to get these for $300 CDN when they're in stock.  
: > Knowing that they'll work on a Sun is even better because that will be the
: > next drive in my Sparc.

: Well, I'm running tree of those disks in my SS2s - running fine. But one
: Question remains unsolved: Jumper 6 on  the  Disk  enables/disables  "TI
: sync negotiation". Could someone explain how I should  set  this  jumper
: for a Sparc 2 and why? (Currently I have disabled this  feature  on  all
: disks.)

From IBM's WWW server, hope it may help:

http://www-i.almaden.ibm.com/storage/oem/sum/dpesdc.htm

> [Storage for OEM]

> Updated December 11, 1995

> IBM OEM storage products
> DPES-30540, DPES-30810 and DPES-31080

> --------------------------------------------------------------------

>    * DC power requirements

>    * Data organization

>    * Signal definition

>    * SCSI cable

>    * SCSI bus terminator

>    * Mode select options

> --------------------------------------------------------------------

> DC power requirements

> The following voltage specifications apply at the file power
> connector. Damage to the file electronics may result if the power
> supply cable is connected or disconnected while power is being
> applied to the file (No hot plug/unplug is allowed). There are
> inductive loads in the file which could cause destructively high
> voltage spikes on the file if the power connection is opened. There
> is no special power on/off sequencing required.

> Nominal Supply Voltages            +5        +12
> Power Supply Ripple
> {mV}(0-10{MHz}P-P)                 100 max   150 max (2)
> Tolerance                          +/-5%     +10%/-8%
> Supply Current
> (Populated Mean)
>   Idle (average)                   0.26      0.12/0.16 {A/B(1)}
>   R/W (average)                    0.62      0.24/0.28 {A/B(1)}
>   Seek (average)                   0.46      0.34/0.37 {A/B(1)}
>   Standby                          0.22      0.02
>   Start up (Peak)                  0.64      1.20

> Notes:

>   1. A/B shows that A is for DPES-30540 and B is for DPES-30810 and
>      DPES-31080.

>   2. The maximum ripple is measured at input of the drive.

>   3. The drive does not incur damage by an over-voltage condition of
>      +25% and the maximum duration of 20 {msec}.

> During the file start up and seeking, 12 volt ripple is generated by
> the file (referred to as dynamic loading). If several files have
> their power daisy chained together then the power supply ripple plus
> other file's dynamic loading must remain within the regulation
> tolerance of +10/-8%. A common supply with separate power leads to
> each file is a more desirable method of power distribution.

> To prevent external electrical noise from interfering with the
> file's performance, the file must be held by four screws in a user
> system frame which has no electrical level deference at the four
> screws position, and has less than +/-300 millivolts peak to peak
> level deference to the file power connector ground.
> --------------------------------------------------------------------

> Data organization

> Logical Layout          DPES          DPES          DPES
>                        -30540        -30810        -31080

> Bytes per Sector         512           512           512
> Number of Heads           2             3             4
> Number of Disks           1             2             2
> Number of LBAs         1058400       1586592       2116800
> Total logical Data    514900800     812335104    1083801600
>  Bytes

> --------------------------------------------------------------------

> Signal definition

> The pin assignments of interface signals are listed as follows:

> PIN       Signal         PIN      Signal
> ----------------------------------------
> 01        Ground         02       -DB(0)
> 03        Ground         04       -DB(1)
> 05        Ground         06       -DB(2)
> 07        Ground         08       -DB(3)
> 09        Ground         10       -DB(4)
> 11        Ground         12       -DB(5)
> 13        Ground         14       -DB(6)
> 15        Ground         16       -DB(7)
> 17        Ground         18       -DB(P)
> 19        Ground         20       Ground
> 21        Ground         22       Ground
> 23        Ground         24       Ground
> 25        Open           26       TRM Power
> 27        Ground         28       Ground
> 29        Ground         30       Ground
> 31        Ground         32       -ATN
> 33        Ground         34       Ground
> 35        Ground         36       -BSY
> 37        Ground         38       -ACK
> 39        Ground         40       -RST
> 41        Ground         42       -MSG
> 43        Ground         44       -SEL
> 45        Ground         46       -C/D
> 47        Ground         48       -REQ
> 49        Ground         50       -I/O

> --------------------------------------------------------------------

> SCSI cable

> The disk drive uses single-ended drivers and receivers which will
> permit cable lengths of up to 6 meters (19.68 feet). For a single
> ended cable a 50 conductor flat cable or a 25 signal twisted cable
> can be used with a maximum length of 6.0 meters, and a stub length
> not exceeding 0.1 meters.
> --------------------------------------------------------------------

> SCSI bus terminator

> The file has an internal Active SCSI bus terminator, and can be
> controlled on/off with one jumper block provided at the card edge.
> The user is responsible for properly terminating and powering the
> SCSI bus in the system.
> --------------------------------------------------------------------

> Mode select options

> Certain parameters are alterable using the SCSI 'Mode Select'
> command. This allows certain drive characteristics to be modified to
> optimize performance on a particular system. Refer to the DPES-3xxxx
> Interface Specification for a detailed definition of Mode Select
> parameters.

> The changeable parameters are:

> Page 0 - Vendor unique parameters

> UQE - Untagged Queuing Enable (1)
> DWD - Disable Write Disconnect (0)
> UAI - Unit Attention Inhibit (0)
> ASDPE - Additional Save Data Pointer Enable (0)
> CMDAC - Command Activated (LED) (0)
> RPFAE - Report Failure Analysis Error (0)
> CPE - Concurrent Processing Enable (1)
> TCC - Thermal Compensation (0)
> DSN - Disable Target Initiated Synchronous Negotiation (0)
> FRDD - Format Degraded (1)
> DPSDP - Data Phase Save Data Pointer (0)
> CAEN - Command Age Limiter Enable (1)
> LITF - Idle Time Function (0)
> ADC - Adaptive Cache Enable (1)
> QEMC - Queue Error Management Control (0)
> DRD - Disable Read Disconnect (1)
> LED - Not supported (0)
> Command Aging Limit (48)
> DRRT - Disable Read Reassign Target (0)
> DNR - Disable Nested Reassigns (1)

> Page 1 - Read-write error recover parameters

> AWRE - Automatic Write Reallocation Enable (1)
> ARRE - Automatic Read Reallocation Enable (1)
> TB - Transfer Block (0)
> PER - Post Error (0)
> DTE - Disable Transfer on Error (0)
> DCR - Disable Correction (0)
> Read Retry Count (01h)
> Write Retry Count (01h)

> Page 2 - Disconnect/reconnect parameters

> Read buffer Full Ratio (00h)
> Write Buffer Empty Ratio (00h)

> Page 7 - Verify error recovery parameters

> PER (0)
> DCR (0)
> Verify Retry Count (01h)

> Page 8 - Caching parameters

> WCE - Write Cache Enable (1)
> RCD - Read Cache Disable (0)
> MF - Multiplication Factor (0)
> Disable Pre-Fetch Transfer Length (0)
> Minimum Pre-Fetch (0)
> Maximum Pre-Fetch (0)
> Maximum Pre-Fetch Ceiling (0)
> Number of Cache Segments (7)

> Page A - Control mode page parameters

> Queue Algorithm Modifier (0)
> QErr - Queue Error (00h)
> DQue - Disable Queing (0)

> Page 0D - Power condition

> Standby (0)
> Standby Timer (00h)

> Note: (xx) default options at shipment

> [Back to previous page ] [ Back to Storage for OEM home page]
> --------------------------------------------------------------------
> [ IBM home page | Order | Search | Contact IBM | Help | (C) | (TM) ]

--
Kind regards,
Luc
______________________________________________________________________________
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best 1 gig drive ?

Post by Roger Jennin » Thu, 22 Feb 1996 04:00:00


I would have replied to the original message, but it is no longer on
my news server,

Best price, or best performance?

Performance:
High performance drives like SCSI II fast and wide spinning at 7200rpm
do not come smaller than 2gig. Of course your controller may not
support the 16 bit wide databus (68 pin, not 50 pin).

Price:
I've seen many 1GB 5400rpm SCSI II drives less than $300 (a little
higher for some) at swap meets in the Los Angeles area. These are what
I consider to be entry level drives (meaning why buy anything
smaller).

To the best of my knowledge (primarily based on Netware systems) there
are two forms of "sync", syncronouse transfer and spindle sync:

Syncronous transfer is prefered over asycronous, doubling the transfer
rate. Frequently (at least on Intel systems) syncronous negotiation is
initiated by the controller.

Spindle sync is  primarily used for RAID systems, Drives who spindles
are "in-sync" means that when sector 1 is under the heads on drive 0,
sector 1 is also under the heads on driver 1, 2 .... n. Many of the
new RAID controllers no longer need the drives to be in-sync (again,
at least on Intel systems).

Hope it helps.





>> >   IBM OEM Pegasus DPES 31080
>> >   Capa: 1.1GB RPM: 5400
>> >   Price: around $400
>> >   (that is at least what we paying them here in Holland)
>>        We put a pair of these drives in our NT server at the office and
>> they've worked flawlessly.  They're definitely not the fastest drive out
>> there, but we're able to get these for $300 CDN when they're in stock.  
>> Knowing that they'll work on a Sun is even better because that will be the
>> next drive in my Sparc.
>Well, I'm running tree of those disks in my SS2s - running fine. But one
>Question remains unsolved: Jumper 6 on  the  Disk  enables/disables  "TI
>sync negotiation". Could someone explain how I should  set  this  jumper
>for a Sparc 2 and why? (Currently I have disabled this  feature  on  all
>disks.)
>--

>                        40233 Duesseldorf          Tel.: +49-211-676-331
>                              FRG/Germany          Fax:  +49-211-676-986