On Wednesday 16 November 2005 11:03 pm, you wrote:

I'm keeping this mail intact for reference on linux-ide.

James Rose wrote:

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Mr. Heo:

I have a couple of questions regarding the sata_sil24 driver, and 

I would

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also like to offer up some test support.

I'm by no means any kind of kernel hacker and only have a 

rudimentary

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understanding of C at best, so I can't provide any code help.  I 

am

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interested in running whatever tests you think could help you with 

the

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driver development.  This box is basically not doing anything, so 

I can

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run automated testing for days at a time.

Here's my h/w specs:
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Intel SE7620AF2 Motherboard
Dual XEON 3.2 GHz with HyperThreading
4 Gig Memory
Silicon Image 3124
Silicon Image 3132
Rancho Technologies MiniStor 3 (Silicon Image 3726 Port Multiplier 

Chip)

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with 4 100GB Hitachi Travelstar SATA Drives
SteelVine 2000 (Silicon Image 3726 Port Port Multiplier Chip) with 

5 400GB

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Hitachi SATA Drives
Various External 500G SATA2 Drives

NOTE: All the hard drives are essentially blank, and can be set up 

as

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RAID/LVM/Whatever, on a per test basis.

Here's my s/w specs:
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kernel 2.6.15rc1-netdev
Debian Sarge for x86 (with udev v0.056-3) [I'm working on getting 

64 bit

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working as well, I'm just not there yet].

I regret I'm unable to provide any kind of shell access (corporate
firewall), but I will happily run whatever you think can help.  

I'm very

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interested in seeing a fully functional (if it already is, my 

apologies. 

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I need to figure out some stuff still) driver released into the 

kernel.

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I'll happily provide lspci's, .configs, etc. upon request.

One thing I wanna verify on sil24 is data integrity with multiple 

disks 

attached.  It would be very helpful if you can do some parallel data 
stress testing with multiple disks.

* Parallel 'badblocks -w -t random' on all attached disks.  Maybe 

repeat 

it for a few days and verify no corrupted IO occurs.

* Create a random 2G or 4G file on a disk (dd if=/dev/urandom 
of=testfile bs=1M count=4K) and parallely fill all disks with the 

file 

(for ((i=0;i<20;i++)); do cp testfile /mnt/sdx/testfile$i; done).  

After 

disks are filled, calculate md5sum of all copies and verify that 

they 

haven't corrupted.  Repeat for a few days.

Thanks for getting back to me on this.  I'll try to set something up 
tomorrow.  BTW, is there any particular filesystem you'd prefer I 
test on (at least initially)?  I've currently got ext3 compiled in, 
but I can reconfigure to whatever.  I'll send results as I get them.

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One Problem:
------------
I am able to see the first drive on each of the port multipliers, 

but I

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cannot seem to find a way to locate the other drives.  Is there an 

option

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I can pass through modprobe, or some other kind of magic?

Unfortunately, port multiplier support is not implemented yet.  

Edward 

Falk (CC'd above, Hi! Edward) used to work on PM support for sil24 a 
while ago and might be able to help you out.

Depressing news.  I'm willing to do what I can to help someone out 
with this.

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If I should have sent this to someone else, please forward this 

along.  I

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didn't know if this was appropriate for me to send to the LKML, so 

I sent

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it to you instead (apologies if I was mistaken).  Please let me 

know what

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I can (or can't) do.

If you have certain requests/questions regarding SATA in general or 
specific SATA driver in particular, write a mail TO the maintainer 

and 

CC linux-ide@vger.kernel.org.  And your mail is completely 

appropriate 

for linux-ide.

will do

-- 
tejun

Regards,

James Rose