Date: Wed, 12 May 2010 18:44:34 -0500 From: Adam Vande More <amvandemore@gmail.com> To: "A. Wright" <andrew@qemg.org> Cc: FreeBSD - <freebsd-questions@freebsd.org>, Mike Tancsa <mike@sentex.net> Subject: Re: Long I/O pauses on same mass storage Message-ID: <AANLkTin7pmKV0xo6mZ3FOEm-eKYJCznHaQW12ekkPTBU@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1005122013470.64303@qemg.org> 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>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, May 12, 2010 at 6:21 PM, A. Wright <andrew@qemg.org> wrote: > This is indeed one of the so-called "eco" drives. > > The controller is set to SATA (no mention of ahci, though I will > now look at it as suggested earlier to see if I can control the > problem that way). > > > > In addition to what I pointed out earlier, I believe that is >> also a 4k sector drive. You'll need to align your partitions >> accordingly. >> > > 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. -- Adam Vande More
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?AANLkTin7pmKV0xo6mZ3FOEm-eKYJCznHaQW12ekkPTBU>