Re: Problem with USB-to-SATA adapters (was: AS2105-based enclosure size issues with >2TB HDDs)

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> From: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>

> Did you try read capacity 16 on it?  What happened?  (the AS2105 rejects
> read capacity 16, so there's no reliable way to deduce the capacity of
> drives over 2TB).

OK, I had to track down which package contains sg_readcap.

The adapter that fails gives this output:

    # sg_readcap --16 /dev/sdb
    bad field in READ CAPACITY (16) cdb including unsupported service action

The adapter that succeeds gives this output:

    # sg_readcap --16 /dev/sdc
    Read Capacity results:
       Protection: prot_en=0, p_type=0, p_i_exponent=0
       Logical block provisioning: lbpme=0, lbprz=0
       Last logical block address=5860533167 (0x15d50a3af), Number of logical blocks=5860533168
       Logical block length=512 bytes
       Logical blocks per physical block exponent=0
       Lowest aligned logical block address=0
    Hence:
       Device size: 3000592982016 bytes, 2861588.5 MiB, 3000.59 GB

Dale
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