On 5/21/2010 4:19 PM, John R Pierce wrote:
Les Mikesell wrote:
But it is just a match for the Seagate drives with the default layout using one partition that fills the disk. If I have to skip some amount at the start of the partition I think that will make the partition size not match, making it impossible to add as a raid member.
750GB drives can vary quite a bit in size +/- depending on the exact model. The required trim is 0-3.5K, and its due to the MBR on the first "track" of the drive before the first/primary partition starts.
The 3.5" Seagates look like: Disk /dev/sdc: 750.1 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdc1 1 91201 732572001 fd Linux raid autodetect
And the 2.5 WD looks the same to me:
Disk /dev/sdh: 750.1 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdh1 1 91201 732572001 fd Linux raid autodetect
These is a backuppc archive with millions of hardlinks that will take forever to copy if I have to do a file-oriented copy onto a different partition size.