Re: If your using large Sata drives in raid 5/6 ....

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Mikael Abrahamsson <swmike@xxxxxxxxx> writes:

> On Tue, 2 Feb 2010, Greg Freemyer wrote:
>
>> (I think these drives may already be available at least as
>> engineering samples.  Basic linux kernel support went in summer 2009
>> I believe. I believe 2.6.33 will be the first kernel to have been
>> tested with these new class of drives.)
>
> I purchased two WD20EARS drives yesterday, going to play around with
> them tonight. They emulate 512 bytes sectors to the SATA layer but
> write them as 4k on drive, so you want to make sure that everything
> that writes to the drive, writes in 4k block size (which is the case
> with most in linux as far as I have understood).
>
> So basically they'll work with any OS, but for best performance you
> need to make sure that things are aligned to 4k boundary and you want
> to write 4k at a time.

Make sure that your partitions are aligned then. Older partitioners will
start the first partition on block 63, meaning 32.5KiB into the disk.

MfG
        Goswin
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux RAID Wiki]     [ATA RAID]     [Linux SCSI Target Infrastructure]     [Linux Block]     [Linux IDE]     [Linux SCSI]     [Linux Hams]     [Device Mapper]     [Device Mapper Cryptographics]     [Kernel]     [Linux Admin]     [Linux Net]     [GFS]     [RPM]     [git]     [Yosemite Forum]


  Powered by Linux