On 01/06/13 15:59, MD wrote:
On 01/06/13 12:56, Kenneth R Westerback wrote:
On Sat, Jun 01, 2013 at 07:38:50AM +0100, MD wrote:
Recently obtained WD7500-BPKT (750g) hard drive that apparently
<snip>
Will Advanced Format Just Work(TM)?
<snip>
If the drive claims to be using 512-byte sectors, everything should
work but potentially be slow due to the drive compensating for
i/o into the middle of 4K sectors.
<snip>
.... Ken
Thanks for the quick response Ken.
dmesg indicates the drive reports 512 byte sectors - bah humbug.
disklabel pushed start to sector 64, though.
Looks like I need to go back in and try to manually create the 4k
sectors by careful management of partition boundaries through
disklabel (I was going to DBAN it, anyway).
Dear He-who-shall-remain-nameless (You know who you are...) ;-))))
and List-friends,
A mere slip of phraseology in my response to Sir Ken... :-))
Advanced Format drives HAVE 4k sectors on the platters, init.
The WD7500-BPKT is an Advanced Format drive.
But your criticism (He-who-etc.-etc.) has been helpful - if only
to bump me back to reality.
My take away is:
On installation, fdisk partitioned the drive by default with the
OpenBSD partition starting at...
Physical/LBA (512-byte) sector 64
(oh yes... nudge-nudge wink-wink)...
and subsequent OpenBSD partitions (i.e. logical partitions)
starting on exact multiples of 4096bytes...
JUST BY ACCIDENT!!!
Thanks for all the help, chaps.
Mike
P.S. The fact my block size in /home is 64k is my fault...
