[Veritas-bu] LTO drive won't run at full speed
2003-08-15 11:33:54
Subject: |
[Veritas-bu] LTO drive won't run at full speed |
From: |
abrowne AT tigr DOT org (Browne, Alec) |
Date: |
Fri, 15 Aug 2003 11:33:54 -0400 |
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The reboot fixed the problem.
Thanks all!
-----Original Message-----
From: Karl.Rossing AT Federated DOT CA [mailto:Karl.Rossing AT Federated DOT
CA]
Sent: August 14, 2003 5:43 PM
Cc: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: Re: [Veritas-bu] LTO drive won't run at full speed
veritas-bu-admin AT mailman.eng.auburn DOT edu wrote on 08/14/2003 04:19:53 PM:
> I believe this has been mentioned here before, and I've experienced this
> myself. The LTO drives on our backup system are SCSI connected. On at
> least two occasions, the scsi bus has experienced some kind of
> disruption to cause it to slow down to SE speeds. When I could normally
> get 20+ MB/sec, the affected drive would not write at speeds above 5
> MB/sec. Rebooting the server fixed the problem. If this happens
> frequently, then it's likely a hardware fault. I was able to confirm
> the slowdown by checking the system logs or dmesg. It would clearly
> show the scsi bus error, the devices affected, and would give the exact
> speed or mode that the card was now operating.
>
> -Jon
Same thing happend with our exabyte mammoth drives.
Reboot fixed the problem.
Karl
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<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=483083315-15082003>The
reboot fixed the problem.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=483083315-15082003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=483083315-15082003>Thanks
all!</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=483083315-15082003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=483083315-15082003></SPAN></FONT> </DIV>
<DIV></DIV>
<DIV><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
Karl.Rossing AT Federated DOT CA [mailto:Karl.Rossing AT Federated DOT CA]
<BR><B>Sent:</B>
August 14, 2003 5:43 PM<BR><B>Cc:</B>
'veritas-bu AT mailman.eng.auburn DOT edu'<BR><B>Subject:</B> Re: [Veritas-bu]
LTO
drive won't run at full speed<BR><BR></DIV></FONT>
<BLOCKQUOTE style="MARGIN-RIGHT: 0px"><BR><BR><FONT
size=2><TT>veritas-bu-admin AT mailman.eng.auburn DOT edu wrote on 08/14/2003
04:19:53 PM:<BR><BR>> I believe this has been mentioned here before, and
I've experienced this <BR>> myself. The LTO drives on our backup
system are SCSI connected. On at <BR>> least two occasions, the scsi
bus has experienced some kind of <BR>> disruption to cause it to
slow
down to SE speeds. When I could normally <BR>> get 20+ MB/sec, the
affected drive would not write at speeds above 5 <BR>> MB/sec.
Rebooting the server fixed the problem. If this happens <BR>>
frequently, then it's likely a hardware fault. I was able to confirm
<BR>> the slowdown by checking the system logs or dmesg. It would
clearly <BR>> show the scsi bus error, the devices affected, and would
give
the exact <BR>> speed or mode that the card was now operating.<BR>>
<BR>> -Jon<BR></TT></FONT><BR><FONT size=2><TT>Same thing happend with our
exabyte mammoth drives.</TT></FONT> <BR><BR><FONT size=2><TT>Reboot fixed the
problem.</TT></FONT> <BR><BR><FONT
size=2><TT>Karl</TT></FONT></BLOCKQUOTE></BODY></HTML>
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