[CentOS] raid resync speed? - laptop drive-

[Les Mikesell]

On 5/21/2010 12:13 PM, John R Pierce wrote:
> Les Mikesell wrote:
>> OK, I can get a full-size Seagate 750G to resync at about 40M/s which
>> easily completes in a workday.  But now what I really want to do is use
>> a laptop size 'WD Scorpio blue' drive which claims to have the same
>> sector count but will only sync at about a tenth of the speed.  It does
>> say it uses 'advanced format', which I think means 4k sectors.  Should
>> that make a difference?  Read speed tests show about the same as the
>> desktop drives but writes are much slower.
>>
>
>    From what I've read, you have to 'trim' those drives much like SSD so
> the partition starts on a 4K boundary.   I understand you can do this
> with parted.

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.

-- 
   Les Mikesell
    lesmikesell at gmail.com