SDA Commands and Mode Pages (93-192r1)
George Penokie
GOP at rchvmp3.vnet.ibm.com
Tue Jan 4 15:23:37 PST 1994
Date: Dec 10,1993 X3T9.2/93-192 rev 1
To: X3T9.2 Committee (SCSI)
From: George Penokie (IBM)
Subject: SDA Commands and Mode Pages
1.0 Overview
To control and configure a SCSI-3 Disk Array several new
commands and mode pages are required. This proposal defines
those commands and mode pages.
<<Editors Note: This pass and only contains an outline of the
commands and mode pages GOP>>
2.0 Extents
2.1 P-extent
All P-extents contain the following information:
-Physical Logical Unit Identifier (P-LUI) 2 bytes
-Start P-LBA 4 bytes
-Number of P-LBAs 4 bytes
-Number of Bytes per P-LBA 2 bytes
Note:For variable block length device types the number of
bytes per P-LBA field shall be set to zero.
2.2 PS-extent
All PS-extents contain the following information:
-Physical Logical Unit Identifier (P-LUI) 2 bytes
-Start PS-LBA 4 bytes
-Number of PS-LBAs 4 bytes
-Number of Bytes per PS-LBA 2 bytes
Note:For variable block length device types the number of
bytes per P-LBA field shall be set to zero.
3.0 Maintenance Operations
W
| 3.1 Report P-LUI Command
|
| This command would send the following parameter list:
|
| -Physical Logical Unit Identifier (P-LUI) (R) 2 bytes
| -Peripheral Device Type (1 per P-LUI) 1 byte
| -Replaceable Unit (1 per P-LUI) 1 bit
|
| Note:Any parameters indicated by a (R) may be repeated. Any
| parameters indicated by a (S) shall only occur once per
| service request.
| 3.2 Report P-LUI Geographic Location Command
|
| The CDB would contain the following:
|
| -Physical Logical Unit Identifier (P-LUI) 2 bytes
|
| This command would return the following parameter list:
|
| -Geographic Location Veriable
| 3.3 Set P-LUI Geographic Location Command
|
| The CDB would contain the following:
|
| -Physical Logical Unit Identifier (P-LUI) 2 bytes
|
| This command would send the following parameter list:
|
| -Geographic Location Variable
|
3.4 Report Physical Space Command
The CDB would contain the following:
-Report assigned/unassigned physical space 1 byte
This command would return the following parameter list:
-P-extent (R) 12 bytes
-Peripheral Device Type (1 per P-extent) 1 byte
-State of the P-extent (1 per P-extent) 1 byte
3.5 Exchange P-LUI Command (Immediate bit in CDB)
The CDB would contain the following:
-Old P-LUI (S) 2 bytes
-New P-LUI (S) 2 bytes
3.6 Remove P-LUI Command
The CDB would contain the following:
-P-LUI (S) 2 bytes
3.7 Exchange P-extent Command (Immediate bit in CDB)
This command would send the following parameter list:
-Old P-extent (S) 12 bytes
-New P-extent (S) 12 bytes
3.8 Set Method of Reporting Informational Exception
Conditions Mode Page
A SDA mode page would contain the following:
-Method of Reporting Informational Exceptions (S) 1 byte
4.0 Redundancy Group Operations
4.1 Create/Modify Redundancy Group Command (Immediate bit in CDB)
This command would send the following parameter list:
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
-Recalculate check data (S) 2 bits
-Preserve protected space (S) 2 bits
-Set protected space to known value (S) 9 bits
-Redundancy Type Identifier (S) 1 byte
-Granularity of Units (bit, byte, logical block, etc.) (S) 1 byte
-P-Extent (R) 12 bytes
-Start check data interleave P-LBA (1 per P-extent) 4 bytes
-Number of units of check data (1 per P-extent) 4 bytes
-Number of units of user data (1 per P-extent) 4 bytes
4.2 Report Redundancy Groups Command
The CDB would contain the following:
-Report all R-LUIs (Yes/No) (S) 1 bit
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
This command would report the following parameter list:
-Redundancy Group Logical Unit Identifier (R-LUI) (R) 2 bytes
-Redundancy Type Identifier (1 per R-LUI) 1 byte
-Granularity of Units (bit, byte, etc.) (1 per R-LUI) 1 byte
-State of the Redundancy Group (1 per R-LUI) 1 byte
-P-Extent (x per R-LUI) 12 bytes
-Start Check Data Interleave P-LBA (1 per P-extent) 4 bytes
-Number of units of check data (1 per P-extent) 4 bytes
-Number of units of user data (1 per P-extent) 4 bytes
4.3 Report Unassigned Redundancy Group Space Command
The CDB would contain the following:
-Report all unassigned R-LUIs (Yes/No) (S) 1 bit
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
This command would report the following parameter list:
-Redundancy Group Logical Unit Identifier (R-LUI) (R) 2 bytes
-Redundancy Type Identifier (1 per R-LUI) 1 byte
-State of the Redundancy Group (1 per R-LUI) 1 byte
-PS-Extent (x per R-LUI) 12 bytes
4.4 Delete Redundancy Group Command
The CDB would contain the following:
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
4.5 Recalculate Check Data Command (Immediate bit in CDB)
The CDB would contain the following:
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
4.6 Verify Check Data Command (Immediate bit in CDB)
The CDB would contain the following:
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
4.6.1 Verify Check Data Mode Page
A SDA mode page would contain the following:
-Enable/Disable Continuous Verification (S) 1 bit
4.7 Control Generation of Check Data Mode Page
A SDA mode page would contain the following:
-Redundancy Group Logical Unit Identifier (R-LUI) (S) 2 bytes
-Enable/Disable Check Data (S) 1 bit
| 4.8 Rebuild P-extent Command (Immediate bit in CDB)
This command would send the following parameter list:
-P-extent (S) 12 bytes
-Redundancy Group Logical Unit Identifier (R-LUI) (R) 2 bytes
| 4.9 Rebuild P-LUI Command (Immediate bit in CDB)
| This command would send the following parameter list:
| -P-LUI (S) 2 bytes
| -Redundancy Group Logical Unit Identifier (R-LUI) (R) 2 bytes
5.0 Volume Set Operations
5.1 Create/Modify Volume Set Command (Immediate bit in CDB)
This command would send the following parameter list:
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
-PS-extent Stripe Length (S) 4 bytes
-PS-extent Interleave Depth (S) 4 bytes
-Granularity of Units (bit, byte, logical block, etc.) (S) 1 byte
-PS-extent (R) 12 bytes
-User Data Stripe Depth (1 per PS-extent) 4 bytes
-Increment/Decrement PS-LBA Count (1 per PS-extent) 4 bytes
5.2 Report Volume Sets Command
The CDB would contain the following:
-Report all V-LUIs (Yes/No) (S) 1 bit
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
This command would report the following parameter list:
-Volume Set Logical Unit Identifier (V-LUI) (R) 2 bytes
-PS-extent Stripe Length (1 per V-LUI) 4 bytes
-PS-extent Interleave Depth (1 per V-LUI) 4 bytes
-Granularity of Units (bit, byte, etc.) (1 per V-LUI) 1 byte
-State of the Volume Set (1 per V-LUI) 1 byte
-PS-extent (x per V-LUI) 12 bytes
-User Data Stripe Depth (1 per PS-extent) 4 byte
-Increment/Decrement PS-LBA Count (1 per PS-extent) 1 bit
5.3 Delete Volume Set Command
The CDB would contain the following:
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
| 5.4 Recalculate V-LUI Check Data Command (Immediate bit in
CDB)
The CDB would contain the following:
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
| This command would send the following parameter list:
| -Start V-LBA (S) 4 bytes
| -Number of V-LBAs (S) 4 bytes
| 5.5 Verify V-LBA Check Data Command (Immediate bit in CDB)
The CDB would contain the following:
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
| This command would send the following parameter list:
| -Start V-LBA (S) 4 bytes
| -Number of V-LBAs (S) 4 bytes
5.5.1 Verify Check Data Mode Page (Immediate bit in CDB)
A SDA mode page would contain the following:
-Enable/Disable Continuous Verification (S) 1 bit
5.6 Control Generation of Check Data Mode Page
A SDA mode page would contain the following:
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
-Enable/Disable Check Data (S) 1 bit
5.7 Control Write Operations Mode Page
A SDA mode page would contain the following:
-Volume Set Logical Unit Identifier (V-LUI) (S) 2 bytes
-Enable/Disable Write Operations (S) 1 bit
6.0 Spare Operations
6.1 Create/Modify P-extent Spare Command (Immediate bit in CDB)
This command would send the following parameter list:
-Spare Logical Unit Identifier (S-LUI) (S) 2 bytes
-P-Extent (S) 12 bytes
-Redundancy Group Logical Unit Identifier (R-LUI) (R) 1 bytes
-Associated P-Extent (R) 12 bytes
6.2 Report P-extent Spare Command
The CDB would contain the following:
-Report all P-extent Spares (Yes/No) (S) 1 bit
-Spare Logical Unit Identifier (S-LUI) (S) 2 bytes
This command would send the following parameter list:
-Spare Logical Unit Identifier (S-LUI) (R) 2 bytes
-P-Extent (1 per S-LUI) 12 bytes
-State of the spare (1 per S-LUI) 1 byte
-Redundancy Group Logical Unit Identifier (R-LUI)(x per S-LUI) 2 bytes
-Associated P-Extent (x per S-LUI) 12 bytes
6.3 Create/Modify P-LUI Spare Command (Immediate bit in CDB)
This command would send the following parameter list:
-Spare Logical Unit Identifier (S-LUI) (S) 2 bytes
-P-LUI (S) 2 bytes
-Redundancy Group Logical Unit Identifier (R-LUI) (R) 2 bytes
-Associated P-LUI (R) 2 bytes
6.4 Report P-LUI Spare Command
The CDB would contain the following:
-Report all P-LUI Spares (Yes/No) (S) 1 bit
-Spare Logical Unit Identifier (S-LUI) (S) 2 bytes
This command would send the following parameter list:
-Spare Logical Unit Identifier (S-LUI) (R) 2 bytes
-P-LUI (1 per S-LUI) 2 bytes
-State of the spare (1 per S-LUI) 1 byte
-Redundancy Group Logical Unit Identifier (R-LUI)(x per S-LUI) 2 bytes
-Associated P-LUI (x per S-LUI) 2 bytes
6.5 Delete Spare Command
The CDB would contain the following:
-Spare Logical Unit Identifier (S-LUI) (S) 2 bytes
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