ID #1068

Known SCSI disks and PGR reservation support

This is a list of disks that have been tested with our SCSI reservation mechanism for disk fencing. Some disks have been shown to behave in such a way that makes them incompatible with SCSI-3 reservations. This does not mean they cannot be used in a cluster - SCSI-2 reservations can be used instead.

This list is not exhaustive and will be regularly updated as we test more disks.

While we use reasonable efforts to include accurate and up-to-date information, we make no warranties or representations as to the accuracy of the content herein and assume no liability or responsibility for any error or omission. Indeed some of the content has been provided by 3rd party user experience and should be viewed in that context. Use of this content is at your own risk. All content is provided “as is” and “as available”. High–Availability Limited nor any of their employees makes any representation or warranty of any kind regarding the content.

Section 1: PGR reservations supported fully

The following disks have shown no issues with SCSI-3 PGR reservations in our testing

Manufacturer Model Firmware
Seagate ST3600957SS


Seagate ST200FM0002 0003
Seagate ST9600205SS 0004
sTec ZeusRAM


sTec S840Z16S2 C406
Toshiba AL13SEB600 DE01







Section 2: Incorrect TUR response

The following disks work OK with PGR reservations in systems where there is a single path to the disk. However, in multipathed systems, when a Test Unit Ready command is issued using a path other than the one used to place to reservation, the response will be 'reservation conflict'. This will cause failfast to immediately panic the machine.

Manufacturer Model Firmware
sTec ZeusRAM C018
sTec * E46F
sTec * E45M
Seagate ST373453FC MS04
Seagate * A001
Seagate ST36000957SS  MS07






Section 3: Not tested in multipath configuration

The following disks work OK with PGR reservations in systems where there is a single path to the disk. However, they have not yet been tested in systems with multiple paths to disks. If they are tested in the future in a multipath configuration, they will be moved to either section 1 or 2.

Manufacturer Model Firmware
HGST HUS724040ALS640 A152
sTec S840E400M2 E495
sTec Z16IZF2E-200UCU E494
Seagate ST1000NM0001 0001
Seagate ST1000NM0001 0002
Seagate ST100FM0002 0003
Seagate ST3300657SS 0008
Seagate ST500NM0001 0002






Section 4: Disk cannot be released once reserved

The following disks can be reserved, but give errors when the release command is given. Therefore, they should not be used with PGR reservations.

Manufacturer Model Firmware
sTec * E45M



Section 5: Disk does not support SCSI-3 PGR reservations

The following disks respond to any PERSISTENT_RESERVE_IN or PERSISTENT_RESERVE_OUT command with 'ERNOTSUP' so they do not support PGR reservations at all.

Manufacturer Model Firmware
Seagate ST3146356SS HS11
Seagate ST3146855SS S52C
Seagate ST3146855SS 5527

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Last update: 2013-12-21 12:26
Author: Matt
Revision: 1.2

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