Date: Wed, 12 May 2010 21:24:13 -0300 (ADT) From: Andrew Hamilton-Wright <AHamiltonWright@MtA.ca> To: Adam Vande More <amvandemore@gmail.com> Cc: FreeBSD - <freebsd-questions@freebsd.org>, Mike Tancsa <mike@sentex.net> Subject: Re: Long I/O pauses on same mass storage Message-ID: <alpine.BSF.2.00.1005122122060.64303@qemg.org> In-Reply-To: <AANLkTin7pmKV0xo6mZ3FOEm-eKYJCznHaQW12ekkPTBU@mail.gmail.com> References: <alpine.BSF.2.00.1005121035480.64303@qemg.org> <201005121456.o4CEurEZ078671@lava.sentex.ca> <alpine.BSF.2.00.1005121632520.64303@qemg.org> <BDDFA682-70FC-4240-AF3C-6AE03168FFE7@mac.com> <alpine.BSF.2.00.1005121726090.64303@qemg.org> <201005122049.o4CKn7kS080566@lava.sentex.ca> <AANLkTil5ozngCzmfiGMgXfhkDW99IW5NaHI4MU2sRz2V@mail.gmail.com> <alpine.BSF.2.00.1005122013470.64303@qemg.org> <AANLkTin7pmKV0xo6mZ3FOEm-eKYJCznHaQW12ekkPTBU@mail.gmail.com>
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On Wed, 12 May 2010, Adam Vande More wrote: > On Wed, May 12, 2010 at 6:21 PM, A. Wright <andrew@qemg.org<mailto:andrew@qemg.org>> wrote: > > As far as I can tell, it is a standard 512 byte sector. The > > general lack of documentation with this drive (shipped in a > > plastic "coffin" -- the only docs supplied with it were the > > label itself), but on the WD site, they indicate: > > Formatted Capacity 1500301 MB > > Used Sectors Per Drive 2930277168 > > As I understand it, all the 64MB EARS model drive have the WD > Advanced Format eg 4k sectors. I don't have one and I'm pulling > this (from the depths of memory || out of my ass), but I think > those drives also have something funky going on where they > report normal 512 sector when in fact they do have 4k ones. > Either way, it wouldn't hurt to align on 1MB boundaries. I just got confirmation back from WD, and your nether regions are correct -- this _is_ a 4096 byte sector drive. I have suggested to WD that they may wish to mention this salient fact somewhere. Thanks again, Andrew.
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