HP P2000 HP StorageWorks P2000 G3 MSA System MPIO DSM Installation Guide (5903 - Page 17

Persistent Group Reservations command - configuration guide

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Example dsmcli> mpiolist 1 MPIO_DISK_INFO InstanceName* = "Root\MPIO\0000_0" NumberDrives = 0x5 DriveInfo = instance of MPIO_DRIVE_INFO { NumberPaths = 0x2 Name = "MPIO Disk0" SerialNumber = "60CFF00E50321A69DE121000" DsmName = "StorageWorks HPMSA2000 Family Multi-Path Device Specific Module" } instance of MPIO_DRIVE_INFO { NumberPaths = 0x2 Name = "MPIO Disk1" SerialNumber = "60CFF00E50323869DE121000" DsmName = "StorageWorks MSA2000 Family Multi-Path Device Specific Module" } instance of MPIO_DRIVE_INFO { NumberPaths = 0x2 Name = "MPIO Disk2" SerialNumber = "60CFF00E50419B68DE121000" DsmName = "StorageWorks MSA2000 Family Multi-Path Device Specific Module" } instance of MPIO_DRIVE_INFO { NumberPaths = 0x2 Name = "MPIO Disk3" SerialNumber = "60CFF00E5041AF68DE121000" DsmName = "StorageWorks MSA2000 Family Multi-Path Device Specific Module" } instance of MPIO_DRIVE_INFO { NumberPaths = 0x2 Name = "MPIO Disk4" SerialNumber = "60CFF00E5041EB3FDE121000" DsmName = "StorageWorks MSA2000 Family Multi-Path Device Specific Module" } pgr Used for diagnostic and troubleshooting purposes only, the pgr (Persistent Group Reservations) command enables you to determine whether the DSM is currently using SCSI-2 Reserve and Release commands or SCSI-3 Persistent commands. It also enables you to specify which commands the DSM is to use. Typically, SCSI Reserve and Release commands are used in clustered environments where it is necessary to limit access to a target device to only one host at a time. Persistent Reservation refers to a set of SCSI-3 commands that replace the original Reserve and Release commands with a more sophisticated mechanism that provides better support for SAN and multipath configurations. The pgr command shows whether the DSM is currently using SCSI-3 Persistent commands and the PGR key. If the pgr command is enabled, the DSM uses SCSI-3 Persistent commands. If the command is HP StorageWorks MSA System MPIO DSM Installation Guide 17

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HP StorageWorks MSA System MPIO DSM Installation Guide
17
Example
pgr
Used for diagnostic and troubleshooting purposes only, the
pgr
(Persistent Group Reservations) command
enables you to determine whether the DSM is currently using SCSI-2 Reserve and Release commands or
SCSI-3 Persistent commands. It also enables you to specify which commands the DSM is to use.
Typically, SCSI Reserve and Release commands are used in clustered environments where it is necessary to
limit access to a target device to only one host at a time. Persistent Reservation refers to a set of SCSI-3
commands that replace the original Reserve and Release commands with a more sophisticated mechanism
that provides better support for SAN and multipath configurations.
The
pgr
command shows whether the DSM is currently using SCSI-3 Persistent commands and the PGR
key. If the
pgr
command is enabled, the DSM uses SCSI-3 Persistent commands. If the command is
dsmcli> mpiolist 1
<ROOT\wmi>
MPIO_DISK_INFO
InstanceName* = "Root\MPIO\0000_0"
NumberDrives = 0x5
DriveInfo =
instance of MPIO_DRIVE_INFO {
NumberPaths = 0x2
Name = "MPIO Disk0"
SerialNumber = "60CFF00E50321A69DE121000"
DsmName = "StorageWorks HPMSA2000 Family Multi-Path
Device Specific Module"
}
instance of MPIO_DRIVE_INFO {
NumberPaths = 0x2
Name = "MPIO Disk1"
SerialNumber = "60CFF00E50323869DE121000"
DsmName = "StorageWorks MSA2000 Family Multi-Path
Device Specific Module"
}
instance of MPIO_DRIVE_INFO {
NumberPaths = 0x2
Name = "MPIO Disk2"
SerialNumber = "60CFF00E50419B68DE121000"
DsmName = "StorageWorks MSA2000 Family Multi-Path
Device Specific Module"
}
instance of MPIO_DRIVE_INFO {
NumberPaths = 0x2
Name = "MPIO Disk3"
SerialNumber = "60CFF00E5041AF68DE121000"
DsmName = "StorageWorks MSA2000 Family Multi-Path
Device Specific Module"
}
instance of MPIO_DRIVE_INFO {
NumberPaths = 0x2
Name = "MPIO Disk4"
SerialNumber = "60CFF00E5041EB3FDE121000"
DsmName = "StorageWorks MSA2000 Family Multi-Path
Device Specific Module”
}