Messages in this thread | | | From | Mike Snitzer <> | Date | Mon, 26 Sep 2011 16:09:50 -0400 | Subject | Re: Detection of Advanced Format drives |
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On Mon, Sep 26, 2011 at 3:48 PM, Joshua Scoggins <theoretically.x64@gmail.com> wrote: > Keep in mind that some AF drives will not report their actual sector > sizes. I have this issue with the WD AV-25 series. This is to provide > compatibility with older operating systems that don't support AF > drives. These are called generation 1 devices. Newer drives will > directly report their sector size as 4096 through the drive identify > data older ones will say 512. At that point you just need to do a > google search to see if it's AF or not.
Linux should publish the discrepancy with these <disk> specific sysfs files:
/sys/block/<disk>/queue/logical_block_size=512 /sys/block/<disk>/queue/physical_block_size=4096
But are you saying you have an AF disk that doesn't publish this discrepancy via the IDENTIFY DEVICE (ATA) or READ CAPACITY 16 (SCSI) command?
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