Re: [flexbackup-help] Version 1.01 and mt setblk in Linux

[Edwin H. <ed...@co...>]

[ Douglas Bollinger wrote: ]
> I've been using the flexbackup script for a long time.  Love it!

Thanks!

> In the latest update, my system has been having trouble,

(Strange, as recent changes haven't touched mt blocksize that I recall)

> I need to have blocks set to 512, but the script takes the 512*1024.  This
> doesn't work for me.  Output of the flexbackup error:
> 
> Neither of these commands worked:
>   mt -f /dev/nst0 setblk 524288
>   mt -f /dev/nst0 defblksize 524288
> 
> But, if I do this manually:
> 
> rodan:~# mt -f /dev/nst0 setblk 524288
> mt: /dev/nst0: Input/output error
> rodan:~# mt -f /dev/nst0 setblk 512   
> rodan:~#
> 
> You can see, I need the blocks in k's, not multiplied by 1024.  In the
> script I had to change line 2251:
> 
> #   $main::mt_blksize = $cfg::blksize * 1024;
>     $main::mt_blksize = $cfg::blksize;
> 
> And now it works.


I bet you can set $blksize=1 and you'd be fine.  A multiple of the
hardware block size is OK in my experience and testing.  

I think the problem you ran into is that 512k is huge and over a limit
somewhere.

Also, does $mt_var_blksize='true' work for you?  That's more often
recommended and is easier than trying to find the right blocksize for your
tape drive.

At any rate, please report back.  I may need to adjust so non-multiples of
1024 bytes can be used.


Thanks, 
  -Edwin


-- 
 Edwin Huffstutler     Linux - because reboots are for hardware changes
 ed...@co...   GnuPG Key ID: AE782DC9