solarflow99, Stripe size is always larger than sector size. For example, a classical RAID adapter such as DELL Perc6/I should have a stripe size from 16kb to 256kb.
So, if a partition is not aligned with stripe size, a significant performance regression of aligned IO should be detected. For example, XFS is sensitive of stripe size, you can do man 'mkfs.xfs', then find "sunit" and "swidth" for additional information. Regards, Kirby Zhou from SOHU-RD +86-10-6272-8261 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of solarflow99 Sent: Tuesday, August 24, 2010 1:08 AM To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list Subject: Re: [rhelv5-list] How can I align the boundary of partition / LVM / FS within the kickstart script? On Sat, Aug 21, 2010 at 9:21 PM, Kirby Zhou <[email protected]> wrote: > How can I align the boundary of partition / LVM / FS within the kickstart > script? > > There are 3 case which we need align with: > > 1. The new 4k sector-size hard disk. > 2. The strip size of a RAID array. > 3. The block size of SSD erasing. Are you sure about #2? If the partition is aligned with the drive's sector size, then the raid stripe size would already be aligned right? P.S. It's also interesting to mention that anaconda sets a different stripe size depending on how big the drive/partition is. I think thats hard coded in too. _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
