[CentOS] RHEL/Centos6 handling disks w/4k sectors?
John R Pierce
pierce at hogranch.com
Sun Feb 6 21:30:31 UTC 2011
On 02/06/11 1:14 PM, Les Mikesell wrote:
> Does anyone know if 4k sectors will be handled better by the kernel in Centos6?
> I'd like to copy backups to a 750Gb laptop type drive for offsite storage but
> the best write speed I can get is about 8MB/sec even with dd to the raw disk
> which shouldn't have an issue with partition alignment.
what are you using on dd as the blocksize (bs=) ? should be a fairly
large multiple of 4K, like 1048576 (eg, 1MB writes).
I get 50-80MB/sec writes to a laptop drive hooked up to my windows
desktop when I'm cloning said laptop drives. if you're only seeing
8MB, something is very wrong.
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