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Switch Process Pair

Switches the primary and backup disk I/O processes.

Switch to Backup Path

Switches processing from the primary to the backup path.

Switch to Primary Path

Switches processing from the backup to the primary path.

Test Verify

Runs the power-on self-test for the disk and tests the internal circuitry of the drive.

Validate Checksum

Scans the user data area of a disk for sector checksum errors. If the action fails, the Action Details

dialog box reports a sector checksum and suggests that you spare the sector only if you believe

there is a drive media problem.

To find additional information, use the OSM Event Viewer. Retrieve events using $ZLOG as the

source criteria and RAL as the subsystem criteria, and look for Disk-sector-failure events (event

number 7001). In the event detail, a Sector-failure-count token shows how many sector checksum

errors were found, and a Disk-logical-sector token appears for each error, providing the logical

address of that failing sector.

You can perform the Validate Checksum action while the disk drive is in use. The action prompts

you to specify an optional process priority for the action. If not specified, the current default priority

is used.

Disk (CLIM-Attached)

Within the CLIM-Attached Disks object, the OSM Service Connection displays this Disk object as

a logical representation of each CLIM-attached SAS or FC disk. A physical representation of each

CLIM-attached SAS disk is displayed under the SAS Disk Enclosure object.

Location in OSM Tree: System > CLIM-Attached Disks > Disk

Attributes

Disk

Displayed in the Attributes tab and Attributes dialog box only if the value is

something other than OK. Values

Service State

Logical

The path that is currently accessing the disk.

Values: Primary, Backup, Mirror, Mirror Backup

Active Path

The current state of the backup disk path. Values.Backup Path State

Indicates whether the disk is a SAS disk, Fibre Channel (FC), or SSD (solid

state drive).

Disk Type

Displayed only if the system is licensed for NonStop Volume Level Encryption,

this attribute indicates whether or not the CLIM to which the SAS disk is

attached has NonStop Volume Level Encryption enabled.

Encryption State

The logical device number used by the operating system to identify the disk.

Example: 7

Logical Device Number

108 System Resources

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 305 306

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