RE: Intel X25-M MLC SSD benchmarks

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-----Original Message-----
From: Eric D. Mudama [mailto:edmudama@xxxxxxxxx] 
Sent: Friday, December 12, 2008 5:28 AM
To: Raz Ben-Yehuda
Cc: Matthew Wilcox; linux-ide@xxxxxxxxxxxxxxx;
linux-scsi@xxxxxxxxxxxxxxx
Subject: Re: Intel X25-M MLC SSD benchmarks

On 12/10/08, Raz Ben-Yehuda <razb@xxxxxxxxxxx> wrote:
> All gave same results for most dd writes commands.
> dd if=/dev/zero of=/dev/sda bs=1M count=1000 oflag=direct , and many
> other variants such erase block size ( 128K ) , several erase block
size
> and so on. Kernel is 2.6.18-8.el5.
> I used all on a supermicro 1025W-UR. Disks have a SAS interface, 80GB.
> Also, I would like to note, I have 8 disks in array, while each one
> perform READS 250 MB/s, together I degrade to 200 MB/s each. As for
> writes I always reach 20 MB/s at best, from a single disk or 20x8 in
> array.

>>Out of curiosity, is write cache enabled or disabled on these devices?
Does not matter. In both cases same low numbers. Write cache depends on
the controller defaults ( Adpaptec AHCI, Intel provides different
default).

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