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MBOX-Line: From george@galis.org  Wed Jun 30 00:43:52 2004
Date: Wed, 30 Jun 2004 00:43:52 -0400
From: George Georgalis <george@galis.org>
To: Sebastian Slota <SSlota@gmx.net>,
       Linux Kernel Mail List <linux-kernel@vger.kernel.org>
Subject: Re: SATA_SIL works with 2.6.7-bk8 seagate drive, but oops
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On Tue, Jun 29, 2004 at 10:46:45AM +0200, Sebastian Slota wrote:
>Tried Kernel with bk8:
> 
>root@t-rex root # cat /proc/mdstat
>Personalities : [raid0] [raid5] [multipath]
>md1 : active raid5 sdc3[2] sdb3[1] sda3[0]
>261730816 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]
>
>md0 : active raid0 sdc2[2] sdb2[1] sda2[0]
>73256064 blocks 128k chunks
>
>unused devices: <none>
>
>root@t-rex root # hdparm -tT /dev/md0
>
>/dev/md0:
>Timing buffer-cache reads: 3896 MB in 2.01 seconds = 1935.71 MB/sec
>Timing buffered disk reads: 274 MB in 3.02 seconds = 90.68 MB/sec
>root@t-rex root # hdparm -tT /dev/md1
>
>/dev/md1:
>Timing buffer-cache reads: 3760 MB in 2.00 seconds = 1879.35 MB/sec
>Timing buffered disk reads: 206 MB in 3.01 seconds = 68.49 MB/secc 
>
>Copy a DVD to HD, both went OK!
>copy data from an ATA HD ( hda ) broke.
>
>I read from ppl they're running linux on some older hardware, maybe thats
>why it doesnt work... but ~25mb/s is nothing for me...
>Also I hear about some patches to limit the speed to ~30MB/s.


I was able to dd ~140 GB with SATA_SIL today, on a stock bk kernel, till
I ran out of disk, no errors. which was a pleasant unexpected surprise.

but when I checked "Timing buffered disk reads" it was around 25 MB/sec
not the ~52 MB/sec I saw before with the oops. The odd thing was this
disk was not in the blacklist so I don't know why it was running slower.

// George


-- 
George Georgalis, Architect and administrator, Linux services. IXOYE
http://galis.org/george/  cell:646-331-2027  mailto:george@galis.org
Key fingerprint = 5415 2738 61CF 6AE1 E9A7  9EF0 0186 503B 9831 1631

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