"PI - Protection Information" drives?
Bengt Ahlgren
bengt.ahlgren at ri.se
Mon Mar 5 17:17:54 UTC 2018
I've recently gotten a (Dell-branded) Seagate drive which seems to be
formatted with something called "Protection Information (PI) type 2".
CDB read/write commands of size 6 seems to work, but any read/write
commands of size 10 (or larger) do not work:
(da20:mps0:0:11:0): READ(10). CDB: 28 00 00 00 00 00 00 01 00 00
(da20:mps0:0:11:0): CAM status: SCSI Status Error
(da20:mps0:0:11:0): SCSI status: Check Condition
(da20:mps0:0:11:0): SCSI sense: ILLEGAL REQUEST asc:20,0 (Invalid command operation code)
(da20:mps0:0:11:0): Error 22, Unretryable error
smartctl output says:
=== START OF INFORMATION SECTION ===
Vendor: SEAGATE
Product: ST600MM0238
Revision: BS04
Compliance: SPC-4
User Capacity: 600,127,266,816 bytes [600 GB]
Logical block size: 512 bytes
Formatted with type 2 protection
LU is fully provisioned
Rotation Rate: 10000 rpm
Form Factor: 2.5 inches
Logical Unit id: XXX
Serial number: YYY
Device type: disk
Transport protocol: SAS (SPL-3)
Local Time is: Mon Mar 5 17:54:09 2018 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Temperature Warning: Disabled or Not Supported
Read Cache is: Enabled
Writeback Cache is: Disabled
Any advice? Does this "Protection Information" work at all with
FreeBSD? Or do I simply need to reformat the drive without this "PI"
stuff?
Bengt
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