Re: Linux RAID Partition Offset 63 cylinders / 30% performance hit?
From: Mattias Wadenstein <hidden>
Date: 2007-12-19 15:01:43
From: Mattias Wadenstein <hidden>
Date: 2007-12-19 15:01:43
On Wed, 19 Dec 2007, Justin Piszcz wrote:
------ Now to my setup / question: # fdisk -l /dev/sdc Disk /dev/sdc: 150.0 GB, 150039945216 bytes 255 heads, 63 sectors/track, 18241 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x5667c24a Device Boot Start End Blocks Id System /dev/sdc1 1 18241 146520801 fd Linux raid autodetect --- If I use 10-disk RAID5 with 1024 KiB stripe, what would be the correct start and end size if I wanted to make sure the RAID5 was stripe aligned? Or is there a better way to do this, does parted handle this situation better?
From that setup it seems simple, scrap the partition table and use the disk device for raid. This is what we do for all data storage disks (hw raid) and sw raid members. /Mattias Wadenstein