4k sector drives
Dear list, I don't know who else to ask this:
I recently bought 2 new 4k sector drives (WD Caviar Green 2TB, WD20EARS), but Linux kernel 2.6.34.1 still says:
# blockdev --getss /dev/sdd 512
Shouldn't that be 4096? Where is the problem?
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Michael Monnerie put forth on 7/20/2010 1:58 PM:
Quoted 9 lines
Dear list, I don't know who else to ask this:
I recently bought 2 new 4k sector drives (WD Caviar Green 2TB, WD20EARS), but Linux kernel 2.6.34.1 still says:
# blockdev --getss /dev/sdd 512Shouldn't that be 4096? Where is the problem?
Firmware sector size translation is the problem. The WD20EARS is apparently not a native 4096K sector size drive, but a transitional product. It is 4k sector size internally but the firmware translates this to 512B sectors to the OS driver. It's a hybrid.
Google "WD20EARS sector size"
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Stan _______________________________________________ xfs mailing list [email protected] http://oss.sgi.com/mailman/listinfo/xfs
Le Tue, 20 Jul 2010 20:58:27 +0200 vous écriviez:
Quoted 7 lines
I recently bought 2 new 4k sector drives (WD Caviar Green 2TB, WD20EARS), but Linux kernel 2.6.34.1 still says:
# blockdev --getss /dev/sdd 512Shouldn't that be 4096? Where is the problem?
They come in emulation mode (like many SATA-II drives came in SATA-I mode). You must set them to 4K blocks manually, for WD IIRC with a DOS software. And you need a controller that supports 4K blocks, too (probably anything older than a year won't).
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http://oss.sgi.com/mailman/listinfo/xfsQuoted 4 lines · On Dienstag, 20. Juli 2010 Emmanuel Florac wrote:
They come in emulation mode (like many SATA-II drives came in SATA-I mode). You must set them to 4K blocks manually, for WD IIRC with a
DOS software. And you need a controller that supports 4K blocks, too (probably anything older than a year won't).
Thank you Emmanuel and Stan,
http://wdc-de.custhelp.com/cgi-
bin/wdc_de.cfg/php/enduser/std_adp.php?p_faqid=5324&p_created=&p_cats=185&p_cv=1.185&p_pv=2.294&p_prods=227%2C294#jumper
shows a jumper exists for "advanced format", but doesn't tell what it does. I'll try to set or unset it depending on what it is now, and see if there's a difference.
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mit freundlichen Grüssen, Michael Monnerie, Ing. BSc it-management Internet Services http://proteger.at [gesprochen: Prot-e-schee] Tel: 0660 / 415 65 31 ****** Aktuelles Radiointerview! ****** http://www.it-podcast.at/aktuelle-sendung.html // Wir haben im Moment zwei Häuser zu verkaufen: // http://zmi.at/langegg/ // http://zmi.at/haus2009/
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