Re: Slow writing speed on LTO4 SAS tape

2010/2/24 Silviu Marin-Caea <[email protected]>:
> On Wed, 24 Feb 2010 10:33 +0100, [email protected] wrote:
>> Just a thought:
>>
>> How fast can you read from the source ?
>
> Fast, it's a RAID with 6 disks.

Hmmm, just to make sure, do a test reading from memory.

dd if=/dev/zero of=/dev/st0

>
>> > tar --create --file /dev/st0
>> > cat file > /dev/st0
>> > dd if=file of=/dev/st0 bs=1M
>> >
>> > The best speed is with dd, around 27 MBytes/s
>
> I also got around 26 MBytes/s with
> tar --blocking-factor=2048
>
> Still way bellow the specifications of the tape drives.
>
> I have two drives in the tape library, I can write to one or both in
> parallel. In either case, the maximum I can get is 26 MB/s

Regards,

-- 
Ciro Iriarte
http://cyruspy.wordpress.com
--
_______________________________________________
suse-sles-e mailing list
[email protected]
http://listx.novell.com/mailman/listinfo/suse-sles-e