On Tue, October 5, 2010 16:47, Casper.Dik@xxxxxxx wrote:
>>My immediate reaction to this is "time to avoid WD drives for a while";
>>until things shake out and we know what's what reliably.
>>But, um, what do we know about say the Seagate Barracuda 7200.12 ($70),
>>the SAMSUNG Spinpoint F3 1TB ($75), or the HITACHI Deskstar 1TB 3.5"
> I've seen several important features when selecting a drive for
> a mirror:
> TLER (the ability of the drive to timeout a command)
I went and got what detailed documentation I could on a couple of the
Seagate drives last night, and I couldn't find anything on how they
behaved in that sort of error cases. (I believe TLER is a WD-specific
term, but I didn't just search, I read them through.)
So that's inconvenient. How do we find out about that sort of thing?
> sector size (native vs virtual)
Richard Elling said ZFS handles the 4k real 512byte fake drives okay now
in default setups; but somebody immediately asked for version info, so I'm
still watching this one.
> power use (specifically at home)
Hadn't thought about that. But when I'm upgrading drives, I figure I'm
always going to come out better on power than when I started.
> performance (mostly for work)
I can't bring myself to buy below 7200RPM, but it's probably foolish
(except that other obnoxious features tend to come in the "green" drives).
Yeah, well. I'm cheap.
> I've heard scary stories about a mismatch of the native sector size and
> unaligned Solaris partitions (4K sectors, unaligned cylinder).
So have I. Sounds like you get read-modify-write actions for non-aligned
I hope the next generation of drives admit to being 4k sectors, and that
ZFS will be prepared to use them sensibly. But I'm not sure I'm willing
to wait for that; the oldest drives in my box are now 4 years old, and I'm
about ready for the next capacity upgrade.
> I was pretty happen with the WD drives (except for the one with a
> broken cache) but I see the reasons to not to pick WD drives over the 1TB
And the big ones are what pretty much everybody is using at home.
Capacity and price are vastly more important than performance for most of
David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/
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