Supported storage devices and file systems

RSCT storage resource manager support is available for various systems and devices.

The following information describes the RSCT storage resource manager support for:

Single-path and multipath storage devices of the IBM® System Storage® DS4000® family
Single-path and multipath storage devices on other IBM System Storage disk systems
Single-path, non-DS4000 storage devices
Network file systems (NFS)

Note: Although the storage resource manager can harvest and monitor any number of supported, attached, external storage devices, it will not harvest more than one local disk on each system.

Support for single-path and multipath storage devices of the IBM System Storage DS4000 family

Table 1 describes the storage resource manager support for single-path and multipath storage devices of the IBM System Storage DS4000 family.

Table 1. Storage resource manager support for single-path and multipath storage devices of the IBM System Storage DS4000 family
AIX®	Linux® on the System z® hardware platform	Power Systems running on Linux Linux on the System x hardware platform
Full support is available for single-path I/O (SPIO) storage devices and for multipath I/O (MPIO) storage devices: Harvested IBM.AgFileSystem resources can be automated. IBM.AgFileSystem resources are harvested if they are of type jfs or jfs2 and reside on storage entities that are harvested themselves (storage entities of classes IBM.LogicalVolume, IBM.VolumeGroup, IBM.Disk). User-defined IBM.AgFileSystem resources can be automated (for example, network file systems). SCSI-2 reservation is supported for single-path devices and for multipath devices using the Redundant Disk Array Controller (RDAC) driver. Limitations: User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster.	Only user-defined IBM.AgFileSystem resources can be automated. Limitations: Resource harvesting is not supported. Even if harvesting is successful, the harvested resources cannot be automated. SCSI reservation is not supported. User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster.	Full support is available for SPIO devices and for MPIO devices with RDAC device drivers: Harvested IBM.AgFileSystem resources can be automated. IBM.AgFileSystem resources are harvested if they are of type ext2, ext3, ext4, or reiserfs and reside on storage entities that are harvested themselves (storage entities of classes IBM.LogicalVolume, IBM.Partition, IBM.VolumeGroup, IBM.Disk). User-defined IBM.AgFileSystem resources can be automated (for example, network file systems). SCSI-2 reservation is supported for disks harvested from the RDAC driver. Linux RAID (/dev/md devices) is supported. Limitations: File systems created on md devices without using LVM will not be harvested or automated. md devices themselves will not be harvested as IBM.Disk resources unless pvcreate has been issued for the /dev/md device. SCSI-2 reservation is not supported for non-RDAC drivers nor for md devices themselves. User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster. EVMS is not supported, which includes any volume groups or logical volumes created or managed by EVMS.

Support for single-path and multipath storage devices on other IBM System Storage disk systems

Table 2 describes the storage resource manager support for single-path and multipath storage devices on other IBM System Storage disk systems.

Table 2. Storage resource manager support for single-path and multipath storage devices on other IBM System Storage disk systems
AIX	Linux on the System z hardware platform	Power Systems running on Linux Linux on the System x hardware platform
Full support is available for single-path I/O (SPIO) storage devices and for multipath I/O (MPIO) storage devices: Harvested IBM.AgFileSystem resources can be automated. IBM.AgFileSystem resources are harvested if they are of type GPFS, mmfs, jfs, or jfs2 and reside on storage entities that are harvested themselves (storage entities of classes IBM.LogicalVolume, IBM.VolumeGroup, IBM.Disk). User-defined IBM.AgFileSystem resources can be automated (for example, network file systems). SCSI-2 reservation is supported for SPIO devices and for MPIO devices using the Redundant Disk Array Controller (RDAC) driver, as well as the IBM SDDPCM driver with the single-path reserve policy for this SCSI-2 reservation. Limitations: User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster. SCSI-2 reservation is not supported for SDD and SDDPCM MPIO drivers.	Only user-defined IBM.AgFileSystem resources can be automated. Limitations: Resource harvesting is not supported. Even if harvesting is successful, the harvested resources cannot be automated. SCSI reservation is not supported. User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster.	Full support is available for SPIO devices and limited support for MPIO devices for the IBM System Storage disk systems: Harvested IBM.AgFileSystem resources can be automated. IBM.AgFileSystem resources are harvested if they are of type GPFS, mmfs, ext2, ext3, ext4, or reiserfs and reside on storage entities that are harvested themselves (storage entities of classes IBM.LogicalVolume, IBM.Partition, IBM.VolumeGroup, IBM.Disk). User-defined IBM.AgFileSystem resources can be automated (for example, network file systems). Any disk supported by Linux RAID (/dev/md devices) is supported. Limitations: SCSI-2 reservation is supported for the RDAC driver only. File systems created on md devices without using LVM will not be harvested or automated. md devices themselves will not be harvested as IBM.Disk resources unless pvcreate has been issued for the /dev/md device. EVMS is not supported, which includes any volume groups or logical volumes created or managed by EVMS. RHEL 5, SLES 10, and SLES 11 support consists of harvesting storage entities of classes IBM.Disk, IBM.VolumeGroup, IBM.LogicalVolume, IBM.AgFileSystem, and IBM.Partition. File systems can be automated, subject to the previously stated limitations for md devices.

Support for single-path, non-DS4000 storage devices

Table 3 describes the storage resource manager support for single-path, non-DS4000 storage devices.

Table 3. Storage resource manager support for single-path, non-DS4000 storage devices
AIX	Linux on the System z hardware platform	Power Systems running on Linux Linux on the System x hardware platform
Full support is available for single-path storage devices: Harvested IBM.AgFileSystem resources can be automated. IBM.AgFileSystem resources are harvested if they are of type jfs or jfs2 and reside on storage entities that are harvested themselves (storage entities of classes IBM.LogicalVolume, IBM.VolumeGroup, IBM.Disk). User-defined IBM.AgFileSystem resources can be automated (for example, network file systems). SCSI-2 reservation is supported. Limitations: User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster.	Only user-defined IBM.AgFileSystem resources can be automated. Limitations: Resource harvesting is not supported. Even if harvesting is successful, the harvested resources cannot be automated. SCSI reservation is not supported. User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster.	Limited support is available: Harvested IBM.AgFileSystem resources can be automated. IBM.AgFileSystem resources are harvested if they are of type ext2, ext3, ext4, or reiserfs and reside on storage entities that are harvested themselves (storage entities of classes IBM.LogicalVolume, IBM.Partition, IBM.VolumeGroup, IBM.Disk). User-defined IBM.AgFileSystem resources can be automated (for example, network file systems). Limitations: Support for SCSI reservation is limited. Perform a disk reserve operation to check whether SCSI reservation is available. User-defined IBM.AgFileSystem resources can only be automated if the disk hosting the file system has the same device name on all nodes in the cluster.

Support for network file systems

Table 4 describes the storage resource manager support for network file systems.

Table 4. Storage resource manager support for network file systems (NFS)
AIX	Linux on the System z hardware platform	Power Systems running on Linux Linux on the System x hardware platform
Network file systems are not harvested. To automate such file systems, you must use user-defined IBM.AgFileSystem resources.	Network file systems are not harvested. To automate such file systems, you must use user-defined IBM.AgFileSystem resources.	Network file systems are not harvested. To automate such file systems, you must use user-defined IBM.AgFileSystem resources.

Note: Network file systems of class IBM.AgFileSystem can only be automated and monitored successfully if the root user of the importing system has write access to the file system.