Micropolis 4 gig hangs under linux

Micropolis 4 gig hangs under linux

Post by Blue Sky Tou » Fri, 21 Apr 1995 04:00:00



I recently purchased a Micropolis 4 gig drive.  Linux or the Adaptec
2842 driver seems to have a major problem with it.

System:

Linux (tried version 1.89 through 2.5)
Intel 100MHz DX4
Micropolis SCSI 1 hard drive
Maxtor SCSI 1 hard drive
Plextor SCSI 2 CD-ROM drive
Wangdat SCSI 2 tape drive
Micropolis 4 gig SCSI 1 hard drive

If I run apps that only lightly touch the 4 gig drive, everything is
fine, but if I do something which causes a lot of activity on the 4 gig
drive, all access to that drive freeze.  Access to the other drives still
works just fine.

I have the drive divided into 2 partitions.  Even if I am only accessing
one of the partitions when it freezes, the other partition is now
unavailable as well.

I have never had any problems with the other drives.  I have tried
FreeBSD and it also has a problem with that drive.

Do I suspect a hardware problem, or a driver problem, or a OS problem?

Thanks for any ideas,

John

 
 
 

Micropolis 4 gig hangs under linux

Post by car » Sat, 22 Apr 1995 04:00:00



: I recently purchased a Micropolis 4 gig drive.  Linux or the Adaptec
: 2842 driver seems to have a major problem with it.

[ lots of stuff deleted ]

: If I run apps that only lightly touch the 4 gig drive, everything is
: fine, but if I do something which causes a lot of activity on the 4 gig
: drive, all access to that drive freeze.  Access to the other drives still
: works just fine.

Yeah, we had a very similar problem with 2 2GB micropilis'.  Whenever any
heavy disk access occurred (like someone reading the News!) the
Micropilis' would hang or cause underflows of data and also timed out.  
In the end the Micropilis' packed up, as in died!  They were returned and
we got ourselves a 4GB Baracuda which was *MUCH* better!

: I have the drive divided into 2 partitions.  Even if I am only accessing
: one of the partitions when it freezes, the other partition is now
: unavailable as well.

That's probably because the whole drive has hung.  A partition is only
the way the OS looks at a disk.  If you are having trouble with the
electronics of a drive and it hangs then *all* partitions on that drive
will hang too.  When talking to SCSI you talk to it in distance from the
physical start of the disk, i.e. if you want to read a block (usually 512
bytes long) which is on the second partition and the first partition is 1 GB
then you would specify the block to read as (1GB/512bytes) whatever that
insane figure is. So 512 bytes into the disk is 1 and 51200 is 100.

: Do I suspect a hardware problem, or a driver problem, or a OS problem?

I would say, from my own previous experience that its a hardware
problem.  Buy a Baracuda!

-Carl

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Micropolis 4 gig hangs under linux

Post by Zenon Fortu » Sun, 23 Apr 1995 04:00:00




>: I recently purchased a Micropolis 4 gig drive.  Linux or the Adaptec
>: 2842 driver seems to have a major problem with it.

>[ lots of stuff deleted ]

>: If I run apps that only lightly touch the 4 gig drive, everything is
>: fine, but if I do something which causes a lot of activity on the 4 gig
>: drive, all access to that drive freeze.  Access to the other drives still
>: works just fine.

>Yeah, we had a very similar problem with 2 2GB micropilis'.  Whenever any
>heavy disk access occurred (like someone reading the News!) the
>Micropilis' would hang or cause underflows of data and also timed out.  
>In the end the Micropilis' packed up, as in died!  They were returned and
>we got ourselves a 4GB Baracuda which was *MUCH* better!

Just want to say, that I am using the Micropolis 2217 AV for more than a year.
I did not see any problems even under a very high I/O load (copying hundreds
of megabytes from one partition to another, for example).
I have the Adaptec 1542C ISA controller, which serves also for an HP DAT drive.
The motherboard: Intel's Mercury PCI.

        Zenon

 
 
 

Micropolis 4 gig hangs under linux

Post by Doctor Pad » Mon, 24 Apr 1995 04:00:00




: >: I recently purchased a Micropolis 4 gig drive.  Linux or the Adaptec
: >: 2842 driver seems to have a major problem with it.
: >
: >[ lots of stuff deleted ]
: >

: Just want to say, that I am using the Micropolis 2217 AV for more than a year.
: I did not see any problems even under a very high I/O load (copying hundreds
: of megabytes from one partition to another, for example).
: I have the Adaptec 1542C ISA controller, which serves also for an HP DAT drive.
: The motherboard: Intel's Mercury PCI.

There are very key differences between their systems (one of them is mine
aswell) and yours.

The first is that you are usning the 1542C which is not quite the same as
the EISA 2742 we had or the 2842 of the other guy.

We are both also using the Normal Micropolis drives and not the better AV
drives.

:       Zenon

-Padds

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Micropolis 4 gig hangs under linux

Post by Andrew McGreg » Tue, 25 Apr 1995 04:00:00


We see the same thing with these things on a Sparc 10/612, Solaris 2.3.
It's the disk. We haven't yet decided what to do about it.

Hint: They're temperature sensitive. They work a LOT better at coolish
temperatures (about 20C exhaust air from the box, HIGH airflow.)
--
Andrew McGregor,
Physics, University of Canterbury, Christchurch, New Zealand.

 
 
 

Micropolis 4 gig hangs under linux

Post by Andreas Bus » Tue, 25 Apr 1995 04:00:00



|> : I recently purchased a Micropolis 4 gig drive.  Linux or the Adaptec
|> : 2842 driver seems to have a major problem with it.
|>
|> [ lots of stuff deleted ]
|>
|> : If I run apps that only lightly touch the 4 gig drive, everything is
|> : fine, but if I do something which causes a lot of activity on the 4 gig
|> : drive, all access to that drive freeze.  Access to the other drives still
|> : works just fine.
|>
|> Yeah, we had a very similar problem with 2 2GB micropilis'.  Whenever any
|> heavy disk access occurred (like someone reading the News!) the
|> Micropilis' would hang or cause underflows of data and also timed out.  
|> In the end the Micropilis' packed up, as in died!  They were returned and
|> we got ourselves a 4GB Baracuda which was *MUCH* better!
|>
|> : I have the drive divided into 2 partitions.  Even if I am only accessing
|> : one of the partitions when it freezes, the other partition is now
|> : unavailable as well.
|>
|> That's probably because the whole drive has hung.  A partition is only
|> the way the OS looks at a disk.  If you are having trouble with the
|> electronics of a drive and it hangs then *all* partitions on that drive
|> will hang too.  When talking to SCSI you talk to it in distance from the
|> physical start of the disk, i.e. if you want to read a block (usually 512
|> bytes long) which is on the second partition and the first partition is 1 GB
|> then you would specify the block to read as (1GB/512bytes) whatever that
|> insane figure is. So 512 bytes into the disk is 1 and 51200 is 100.
|>
|> : Do I suspect a hardware problem, or a driver problem, or a OS problem?
|>
|> I would say, from my own previous experience that its a hardware
|> problem.  Buy a Baracuda!
|>

We've just got a 3.6 Gig 5.25" Micropolis. First I had very
similar problems, but after replacing it's power supply
everything was fine. Well, check your power supply before
buying a Barracuda!

Andy

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