PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System)

2.3 SDX Disk

Physical disks managed by GDS are registered with a certain class and are called SDX disks, or simply "disks."Disks that no longer need to be managed with GDS can be deleted from the class and are returned to their original physical disk status.

 

Attributes

A disk has the following attributes.

Name

This attribute identifies the disk within a class.

Type

This attribute indicates the type of disk. Either of the following values will be set.

Mirror

The disk has been connected to a mirror group.

Stripe

The disk has been connected to a stripe group.

Concatenation

The disk has been connected to a concatenation group.

Switch

The disk is connected to a switch group.

Keep

Retains the disk format and data when registered with a class or connected to a group.

Single

A volume can be created without connecting to a group.

Spare

The disk will be used as a spare disk.

Undefined

The disk has been registered with the class without its usage being specified.

 

Operation

The following operations are available for disks.

Create

A disk can be created by registering a physical disk with a certain class, using the sdxdisk -M command. For details on GDS Management View, see "Class Configuration."

Delete

A disk can be deleted from a class with the sdxdisk -R command.

For details on GDS Management View, see "Removing a Class."

Connect

A disk can be added to a certain group with the sdxdisk -C command.

For details on GDS Management View, see "Group Configuration."

Disconnect

A disk can be disconnected from the group with the sdxdisk -D command.

For details on GDS Management View, see "Group Configuration."

Swap

A disk can be prepared for swapping with the sdxswap -O command.

For details on GDS Management View, see "Disk Swap."

Recover

Swapped disks can be recovered with the sdxswap -I command.

For details on GDS Management View, see "Disk Swap."

Status Display

The disk status can be displayed with the sdxinfo command.

For details on GDS Management View, see "Viewing Configurations and Monitoring Statuses."

Change Attributes

Disk attribute values can be changed with the sdxattr -D command.

For details on GDS Management View, see "Class Configuration."

Clear Errors

The I/O error status of SDX disks can be cleared with the sdxfix -D command.

The operation from GDS Management View is unsupported.

 

Status

A disk can have the following status.

ENABLE

The disk is in the normal status.

Unless you conduct a special operation, or a special event occurs, a disk is usually in the ENABLE status.

DISABLE

Data on the disk is inaccessible.

The configuration information of disks is checked on system startup, and if any disk is determined as a disk not managed with GDS, it is DISABLED. If this happens, all slices related to the disk are made the NOUSE status.

For details, see "Disk Status Abnormality."

SWAP

Data on the disk is inaccessible and the disk is ready for swapping.

Successful completion of the sdxswap -O command will make the disk the SWAP status. If this happens, all slices related to the disk are made the NOUSE status.

 

Reference

There are the following points of concern for disks.

Rules

Number of Disks

Number of Keep Disks

Important Points

Restraining Access to Physical Special File

Initializing Disk

Disk Size

Hot Spare

Keep Disk

GFS Partition on a Keep Disk

 

[Figure: SDX Disk]