Re: "sr: unaligned transfer" in 2.5.2-pre1

[Petr Titera <P.Titera@century.cz>]

Peter Osterlund wrote:

> Hi!
> 
> When trying to mount an ISO9660 CD on my USB CDRW unit, I get lots
> of "sr: unaligned transfer" messages from the kernel and the mount
> command fails. This message was added in kernel 2.5.1 and the
> sr_scatter_pad() function was removed at the same time. The comment
> above the message hints that unaligned transfers are (or were) a
> normal thing.
> 
> I added a printk to get more information:
> 
>         sr: unaligned transfer
>         sr: sector 64, s_size 2048, bufflen 1024
>         sr: unaligned transfer
>         sr: sector 68, s_size 2048, bufflen 1024
>         sr: unaligned transfer
>         sr: sector 72, s_size 2048, bufflen 1024
>         ...
>         sr: unaligned transfer
>         sr: sector 396, s_size 2048, bufflen 1024
>         Unable to identify CD-ROM format.
> 
> So, what changes are needed to make CD support work?
> 
> 

Use -o block=2048 as your mount option. There is error in sr code 
causing block sizes of CD-ROM drives to be incorrectly initialized to 
1024 bytes.


Petr Titera
P.Titera@century.cz