Hi,
the question is which WD Green drives you are using. WDxxEADS or WDxxEARS. The
WDxxEARS have a 4k physical sector size instead of 512B. You need some special
trickery to get the max performance out of them, probably even more so in a
raidz configuration.
See
I have both EVDS and EARS 2TB green drive. And I have to say they are not good
to build storage servers.
EVDS has compatibility issue with my supermicro appliance. it will hang when
doing huge data send or copy. from IOSTAT I can see the data throughput is
stuck on green disks with
I have both EVDS and EARS 2TB green drive. And I have to say they are
not good to build storage servers.
I think both have native 4K sectors; as such, they balk or perform slowly
when a smaller I/O or an unaligned IOP hits them.
How are they formatted? Specifically, solaris slices must be
Roy Sigurd Karlsbakk wrote:
device r/s w/s kr/s kw/s wait actv svc_t %w %b
cmdk0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
cmdk1 0.0 163.6 0.0 20603.7 1.6 0.5 12.9 24 24
fd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd1 0.5 140.3 0.3 2426.3 0.0 1.0 7.2 0 14
sd2 0.0
Regarding vdevs and mixing WD Green drives with other drives, you might find it
interesting that WD itself does not recommend them for 'business critical' RAID
use - this quoted from the WD20EARS page here
(http://www.wdc.com/en/products/Products.asp?DriveID=773):
i
Desktop / Consumer RAID
- Original Message -
Regarding vdevs and mixing WD Green drives with other drives, you
might find it interesting that WD itself does not recommend them for
'business critical' RAID use - this quoted from the WD20EARS page here
(http://www.wdc.com/en/products/Products.asp?DriveID=773):
sb == Simon Breden sbre...@gmail.com writes:
sb WD itself does not recommend them for 'business critical' RAID
sb use
The described problems with WD aren't okay for non-critical
development/backup/home use either. The statement from WD is nothing
but an attempt to upsell you, to
IIRC the currently available WD Caviar Black models no longer enable TLER to be
set. For WD drives, to have TLER capability you will need to buy their
enterprise models like REx models which cost mucho $$$.
--
This message posted from opensolaris.org
described problems with WD aren't okay for
non-critical
evelopment/backup/home use either.
Indeed. I don't use WD drives for RAID any longer.
The statement
from WD is nothing
but an attempt to upsell you, to differentiate the
market so they can
tap into the demand curve at multiple
hi all
I just setup this test box on OI. It has a couple of X25Ms, 80GB and eight 2TB
drives, two of them Hitachi Deskstar 7k2 drives and the other six WD Green. I
have done some tests on this with mirrors to compare the performance and those
tests conclude that the Hitachi drives are 25% or
Is this a sector size issue?
I see two of the disks each doing the same amount of work in roughly half the
I/O operations each operation taking about twice the time compared to each of
the remaining six drives.
I know nothing about either drive, but I wonder if one type of drive has twice
the
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Roy Sigurd Karlsbakk
extended device statistics
devicer/sw/s kr/s kw/s wait actv svc_t %w %b
sd1 0.5 140.30.3 2426.3 0.0 1.07.2 0 14
sd2
extended device statistics
device r/s w/s kr/s kw/s wait actv svc_t %w %b
sd1 0.5 140.3 0.3 2426.3 0.0 1.0 7.2 0 14
sd2 0.0 138.3 0.0 2476.3 0.0 1.5 10.6 0 18
sd3 0.0 303.9 0.0 2633.8 0.0 0.4 1.3 0 7
sd4 0.5 306.9 0.3 2555.8 0.0 0.4 1.2 0 7
sd5 1.0 308.5 0.5 2579.7
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