[9fans] scsi raid controller

[9fans] scsi raid controller

[Andrew]

I have a couple of scsi raid controllers. One is mylex in nature the
other is some sort of an sd53c8xx. It attaches to a special raid bay
with some drives in it. I've gotten both to work in linux before. I'd
like to use one of these in a venti server. Are they supported? If so
how can I get them to work?

I've tried using a kernel with scsi support for both sdmylex and sd53c8xx
built in. Yet only the onboard scsi shows up.


Thanks
Andrew

Re: [9fans] scsi raid controller

[Dan Cross]

There's no support for SCSI RAID devices.  If you can get them to imitate
a standard controller, it might work.

	- Dan C.

RE: [9fans] scsi raid controller

[Nigel Roles]

I'm not aware of a 53c8xx raid controller. What does pci say
about the device ids? What is the controller called when connected
to Linux?

-----Original Message-----
From: 9fans-admin@cse.psu.edu [mailto:9fans-admin@cse.psu.edu]On Behalf
Of Andrew
Sent: 14 April 2003 04:56
To: 9fans@cse.psu.edu
Subject: [9fans] scsi raid controller


I have a couple of scsi raid controllers. One is mylex in nature the
other is some sort of an sd53c8xx. It attaches to a special raid bay
with some drives in it. I've gotten both to work in linux before. I'd
like to use one of these in a venti server. Are they supported? If so
how can I get them to work?

I've tried using a kernel with scsi support for both sdmylex and sd53c8xx
built in. Yet only the onboard scsi shows up.


Thanks
Andrew

Re: [9fans] scsi raid controller

[Russ Cox]

> There's no support for SCSI RAID devices.  If you can get them to imitate
> a standard controller, it might work.

Our main Venti server runs on a big RAID.
I don't know details of how it works, but
it does work.  Presumably it does imitate
a really big disk.

There's definitely no support for software
RAID, though if you want mirroring there's fs(3).

RE: [9fans] scsi raid controller

[Nigel Roles]

At a guess it's an external box which
emulates a SCSI hard disk, but consists
of a RAID processor and a bank of drives.
Any configuration/rebuild is controlled
by a front panel.

There are also 2 or 3 drive + CPU combos
you can get for PCs which again emulate
a single IDE/SCSI drive. These typically
have hot swap trays and a small LCD to
control them, so that the host PC needs
no extra hardware or software. Quite a nice
way to do it, but not very cheap.

-----Original Message-----
From: 9fans-admin@cse.psu.edu [mailto:9fans-admin@cse.psu.edu]On Behalf
Of Russ Cox
Sent: 14 April 2003 13:56
To: 9fans@cse.psu.edu
Subject: Re: [9fans] scsi raid controller


> There's no support for SCSI RAID devices.  If you can get them to imitate
> a standard controller, it might work.

Our main Venti server runs on a big RAID.
I don't know details of how it works, but
it does work.  Presumably it does imitate
a really big disk.

There's definitely no support for software
RAID, though if you want mirroring there's fs(3).

Re: [9fans] scsi raid controller

[Andrew]

hmm its actually a 53c770, so i was incorrect there. I wasnt the one
who set it up under linux so i dont know what driver actually makes it
work. I can find out if youd like. Maybe if i get bored someday I'll port
one of them from linux to plan9. The mylex card at least works as a block
device, so could concievably be made to look like a drive fairly easily.

Thanks for the help/de-mystification.

Andrew

On Mon, Apr 14, 2003 at 07:11:22AM +0100, Nigel Roles wrote:
> I'm not aware of a 53c8xx raid controller. What does pci say
> about the device ids? What is the controller called when connected
> to Linux?
>
> -----Original Message-----
> From: 9fans-admin@cse.psu.edu [mailto:9fans-admin@cse.psu.edu]On Behalf
> Of Andrew
> Sent: 14 April 2003 04:56
> To: 9fans@cse.psu.edu
> Subject: [9fans] scsi raid controller
>
>
> I have a couple of scsi raid controllers. One is mylex in nature the
> other is some sort of an sd53c8xx. It attaches to a special raid bay
> with some drives in it. I've gotten both to work in linux before. I'd
> like to use one of these in a venti server. Are they supported? If so
> how can I get them to work?
>
> I've tried using a kernel with scsi support for both sdmylex and sd53c8xx
> built in. Yet only the onboard scsi shows up.
>
>
> Thanks
> Andrew