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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 08-08-2002, 07:51 PM   #1
rholder
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Dlt 7000


Okay, I am a bit stumped here.

I want to add a DLT 7000 to my server(s).

SYSTEM: These two are both running RH7.3 and have SCSI hardware RAID. RH sees the new SCSI card, (I am installing various SCSI cards to eliminate a card issue on which this DLT will run). The new SCSI card sees the DLT drive.

PROBLEM: RH does not see the DLT drive. There is nothing about it in /proc/scsi/scsi and there is no mention of it in dmesg.

My thought is that it has to do with the RAID controller, as the system sees it first. If I put the new SCSI card in above the RAID card the system will not boot, as the new card is bootable but has no drives attached.

Any information to sort this would be greatly appreciated.
/b
 
Old 08-08-2002, 09:00 PM   #2
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Re: Dlt 7000

Quote:
Originally posted by rholder
Okay, I am a bit stumped here.

I want to add a DLT 7000 to my server(s).

SYSTEM: These two are both running RH7.3 and have SCSI hardware RAID. RH sees the new SCSI card, (I am installing various SCSI cards to eliminate a card issue on which this DLT will run). The new SCSI card sees the DLT drive.

PROBLEM: RH does not see the DLT drive. There is nothing about it in /proc/scsi/scsi and there is no mention of it in dmesg.

My thought is that it has to do with the RAID controller, as the system sees it first. If I put the new SCSI card in above the RAID card the system will not boot, as the new card is bootable but has no drives attached.

Any information to sort this would be greatly appreciated.
/b
Gidday m8

What type is your RAID-Controller/ your additional SCSI-Controller?

Hmmm ... unfortunately SCSI-hardware (and the more when there's several
different controllers involved) is a bit tricky ... what I've successfuly done in
the past is for instance swap the PCI slots of the SCSI-cards in question...

If RedHat doesn't recognise your new controller out of the box you might
want to try loading the relevant module manually, and (in case it's working)
add that to your relevant RH rc-file manually.

Cheers,
Tink
 
Old 08-08-2002, 09:04 PM   #3
rholder
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G'day.

I have tried this on two systems, both with IBM RAID controllers. The second cards have been Acard, Adaptec, and Advansys.

RH sees both cards, just not the DLT. The cards see the DLT, (I know this as it is listed when the card is shown upon boot).

If I swap the card locations then one system will not even boot, as it is trying to now boot the first SCSI device rather than the RAID. The other system is an IBM server with a built-in RAID backplane.

/b
 
Old 08-08-2002, 09:06 PM   #4
rholder
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[More]

Just rebuilt one system, the test system, from scratch with the DLT connected....and cat /prpc/scsi/scsi shows the drive. I will try its' functionality now.

Don't really want to have to re-build the production server.

/b
 
Old 08-08-2002, 09:34 PM   #5
rholder
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[More]

Okay, system is working that I just built with the DLT already attached.

Now, how do I make it work on the existing produciton server?

/b
 
Old 08-13-2002, 06:41 PM   #6
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Quote:
Originally posted by rholder
[More]

Okay, system is working that I just built with the DLT already attached.

Now, how do I make it work on the existing produciton server?

/b
Gidday, and sorry for the delay...

Wouldn't know how to convince RH to do anything hardware related,
been a while since I dumped RH :} ... I think I remember a tool called
anakonda in RH that does the configuration of new hardware?

Hope you can make sense of that :}

Cheers,
Tink
 
Old 08-13-2002, 08:46 PM   #7
rholder
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G'day,

Thanks for the reply. anakonda does not seem to be installed, though I did install everything.

No worries though. I built a test system with the drive attached and tested the throughput....much to my dismay the throughput on the Linux system is slower than on the Windows system using Back-up Exec....not sure why, as the file system and network system is so much faster in every other way.

Cheers.

/b
 
Old 08-14-2002, 02:01 AM   #8
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Quote:
Originally posted by rholder
G'day,

Thanks for the reply. anakonda does not seem to be installed, though I did install everything.

No worries though. I built a test system with the drive attached and tested the throughput....much to my dismay the throughput on the Linux system is slower than on the Windows system using Back-up Exec....not sure why, as the file system and network system is so much faster in every other way.

Cheers.

/b
Gidday!

Hmmm ... I currently haven't got a SCSI-Controller, so can't look the settings (tiny kernel,
no SCSI-modules) up for you, but you might want to look at device settings for tagging
and queueing.

Also, the windows drivers might exploit hardware compression ... by what factor does
winDOHs beat Linux?

Cheers,
Tink
 
  


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