[Lustre-discuss] state of sun x4500 drivers

[Shuichi Ihara]

Which kernel are you using?
It looks your 0.81 is newer than original rhel4.x's (or rhel5) one.
This is not about the disk driver, but X4500(a.k.a Thumper) needs the Linux RAID patches
to use as OSS. This patches are included in the lustre patched kenrel and can use on
rhel4.x (CentOS 4.x) right now.

Thanks,

-Ihara

Brian Behlendorf wrote:
> Recently I have also been doing some linux work with the x4500 and I have been 
> using the sata_mv driver (v0.81).  The driver will properly detect all the 
> drives and you may access them safely.  However, from what I've seen the 
> driver needs some further development work to actually perform well.  I see 
> only 30 MB/s write rates to a single disk using a simple streaming dd test.  
> Much of this bad performance may simply be due to the fact that the driver 
> can not enable the disk write-back cache forcing you to use write-thru mode.
> 
> So currently the bottom line is linux will work on the x4500.  But to get it 
> working well someone is going to need to invest some development effort to 
> improve the linux driver.
> 
> Good luck,
> Brian
> 
> 
>> There was some discussion about the driver/module for the sata
>> controlers in the thumper (x4500) in the linux kernel.
>>
>> My question is if we bought one of these,  would the CFS kernel have
>> everything needed to use the thumper in a safe way.
>> Thank You.
>>
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