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.
--
Les Mikesell
lesmikesell at gmail.com