what is the good geometry for disk WD10EADS
Patrick Proniewski
patpro at patpro.net
Thu Nov 19 13:46:19 UTC 2009
Hello,
I've just added a WD10EADS disk in my FreeBSD box (<http://www.wdc.com/en/products/Products.asp?DriveID=559
>)
My mother board is few years old and supports only SATA I, so the
drive is recognized as SATA150 (which is fine):
ad6: 953869MB <WDC WD10EADS-00M2B0 01.00A01> at ata3-master SATA150
Unfortunately, I'm unable to find the right geometry in order to
format/label the disk. Using sysintall interface to handle the new
disk yields to this kind of alerts:
(1st alert) WARNING: A geometry of 1938021/16/63 for ad6 is
incorrect ...
(2nd alert) WARNING: A geometry of 121601/255/63 for ad6 is
incorrect ...
(3rd alert) WARNING: A geometry of 121601/255/63 for ad6 is
incorrect ...
(ad lib)
So, the software tries to guess the right geometry, but fails and
stick with wrong numbers (121601/255/63)
I have this:
# diskinfo -v ad6
ad6
512 # sectorsize
1000204886016 # mediasize in bytes (932G)
1953525168 # mediasize in sectors
1938021 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
But fdisk thinks it's not good.
And mounting the formated disk fails (121601/255/63):
# mount /dev/ad6s1c /backup
mount: /dev/ad6s1c on /backup: incorrect super block
I don't know where to look, the BIOS says nothing about the geometry
(unless I've missed something). It's on LBA mode.
patpro
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