From: Lieberg, Patrick (plieberg@EV3.NET)
Date: Thu Apr 29 2004 - 14:31:56 EDT
In my previous position, mksysb never worked until I changed the block size to 0 (variable). This was on new F50s we were deploying at the time. Looking at our other deployed control workstations, which were F40 and F50, they also had the block size at 0.
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Holger.VanKoll@SWISSCOM.COM
Sent: Thursday, April 29, 2004 1:09 PM
To: aix-l@Princeton.EDU
Subject: Re: Restoring file from MKSYSB (summary)
I never changed block_size , never had problems.
But doing mksysb is not very fast.
Where can I read about pros/cons of changing the block_size?
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of
John Jolet
Sent: Thursday, April 29, 2004 7:52 PM
To: aix-l@Princeton.EDU
Subject: Re: Restoring file from MKSYSB (summary)
hmm, really? I've always specified block size of zero for my
makesysbs. Otherwise it's too slow.
Stamper, Steve wrote:
> Thanks for everyone's feedback. I tried everyone's suggestion (see
> snip below) and still ended up with the same results. I then started
> wondering if I had a bad tape so I did another MKSYSB; same results.
> I changed the block_size between 1024 and 512; same results. I then
> set the block_size to 0 (variable) and TADA!!! This goes against what
> I have learned about MKSYSB tapes so I guess I need to do some
research.
>
> Thanks everyone for your help - Steve
>
> <snip_o_failures>
> # tctl -f /dev/rmt0 rewind
> # tctl -f /dev/rmt0.1 fsf 2
> # restore -Tvf /dev/rmt0.1
> Please mount volume 1 on /dev/rmt0.1.
> Press the Enter key to continue.
>
> restore: 0511-160 Cannot read the backup media
> /dev/rmt0.1: There is an input or output error.
>
> # tctl -f /dev/rmt0 rewind
> # restore -s4 -xvf /dev/rmt0.1 ./etc/motd
> Please mount volume 1 on /dev/rmt0.1.
> Press the Enter key to continue.
>
> restore: 0511-157 Cannot skip tape records.
> #
>
> # tctl -f /dev/rmt0 rewind
> # restore -s3 -xvf /dev/rmt0.1 ./etc/motd
> Please mount volume 1 on /dev/rmt0.1.
> Press the Enter key to continue.
>
> restore: 0511-160 Cannot read the backup media
> /dev/rmt0.1: There is an input or output error.
> #
>
> # tctl -f /dev/rmt0 rewind
> # restore -s2 -xvf /dev/rmt0.1 ./etc/motd
> Please mount volume 1 on /dev/rmt0.1.
> Press the Enter key to continue.
>
> restore: 0511-262 Read an unexpected end of file.
> #
>
> </snip_o_failures>
>
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