From: Kumar, Praveen (cahoot) (Praveen.Kumar@CAHOOT.COM)
Date: Fri May 07 2004 - 10:23:28 EDT
Yes i do accept that rmt0 need not the logical device name..i took it for
granted that the device name would be replaced appropriately. Yes the size
should be given in bytes...which is 131072..
Praveen
-----Original Message-----
From: James Jackson [mailto:James.Jackson@ARKANSAS.GOV]
Sent: 07 May 2004 14:43
To: aix-l@Princeton.EDU
Subject: Re: AIX backup and restore help requested.
I believe that block_size is expressed in bytes, so for 128k, you'd need
a value of 131072. Also, your device ID may not be rmt0; it depends on
the number of tape devices that are configured and the configuration
order.
Regards,
James Jackson
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of
Kumar, Praveen (cahoot)
Sent: Friday, May 07, 2004 2:23 AM
To: aix-l@Princeton.EDU
Subject: Re: AIX backup and restore help requested.
Try using the chdev command to change the block size of the tape drive
in
question.
chdev -l rmt0 -a block_size=128
Regards
Praveen.K
-----Original Message-----
From: Robert Clark [mailto:res03db2@GTE.NET]
Sent: 07 May 2004 03:10
To: aix-l@Princeton.EDU
Subject: AIX backup and restore help requested.
I've been asked to send some data to a customer site, and I need some
help.
I'm using a 3592J1A tape drive in a 3494 library attached via SAN using
the atape driver, on AIX 4.33 ML10.
I have a feel for that portion of the work, as we use this setup for day
to day operations with TSM.
The problem I'm running into, is that the 3592 would perform better with
128k or larger block sizes, but I'm having trouble getting "backup" and
"restore" to generate or use 128k blocks.
I've read and re-read the manpages for backup and restore, and it seems
like the "-b" switch determines how many 512 byte blocks make up a
cluster, but this doesn't sound like what I need. (?)
I've also tried having "backup" use standard out, and passing that to dd
to do block size conversion. So far the results are mixed.
Can anyone on the list spare some wisdom wrt "backup" and "restore".
Thanks, [RC]
.sophos.3.80.05.06.
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