Managing SAS Disks in Linux

Removing type 1 protection

Some HGST/Oracle/Sun drives report Type 1 DIF protection.

smartctl -i /dev/sdl

=== START OF INFORMATION SECTION ===
Vendor:               HGST
Product:              H7240AS60SUN4.0T
Revision:             A3A0
Compliance:           SPC-4
User Capacity:        4,000,787,030,016 bytes [4.00 TB]
Logical block size:   512 bytes
Formatted with type 1 protection
8 bytes of protection information per logical block
LU is fully provisioned
Rotation Rate:        7200 rpm
Form Factor:          3.5 inches
Logical Unit id:      0x5000cca03b49d150
Serial number:        001403E9LHUX        PBH9LHUX
Device type:          disk
Transport protocol:   SAS (SPL-4)
Local Time is:        Tue Dec 12 22:50:50 2023 UTC
SMART support is:     Available - device has SMART capability.
SMART support is:     Enabled
Temperature Warning:  Enabled

We can reformat SAS drive and get rid of that Type 1 DIF field.

sg_format -v --format --fmtpinfo=0 --pfu=0 --size=512 --six /dev/sdl

AWRE and ARRE

AWRE - Automatic Write Reassignment Enabled

ARRE - Automatic Read Reassignment Enabled

Check your drive

sdparm --get awre,arre /dev/sda

    /dev/sda: HGST      H7240AS60SUN4.0T  A3A0
AWRE          1  [cha: y, def:  1, sav:  1]
ARRE          1  [cha: y, def:  1, sav:  1]