i5 Disk Attributes

Use the i5 Disk attributes to monitor the status and details for disk units. This includes the type and status of protection in use for the disk units. i5 Disk attributes are sampled attributes in the operational areas of configuration and operations.

The i5 Disk attribute group is similar to the OS/400 Disk Unit attribute group and contains several of the same attributes. The differences are that the i5 Disk attributes are gathered using a faster mechanism, and they contain disk protection and status information added over the past few i5/OS releases. The OS/400 Disk Unit attributes can still be used for their detailed performance numbers, but they will continue to use the performance collection function of i5/OS. The performance collection function requires several fifteen second or longer intervals to gather data, and uses more i5/OS resources then the mechanism used for the i5 Disk attributes.


ASP number The number of the Auxiliary Storage Pool to which this unit is currently allocated. A value of 0 indicates that this unit is currently unallocated. A value of 1 specifies the system ASP. A value of 2 through 32 indicates a basic user ASP. Independent user ASPs have a value of 33 through 255.

Capacity The space, in number of Megabytes, on the non-mirrored unit or mirrored pair. This is the capacity of the unit prior to any formatting or allocation of space by the system. For a mirrored pair, this space is the number of bytes of auxiliary storage on either one of the mirrored units. Unit capacity is also known as "logical capacity". For compressed drives the logical capacity is dynamic and changes depending on how well the data is compressed. This value is zero for non-configured units.

Compressed Indicates that the unit uses compression. The logical capacity of the unit may be greater than its physical capacity in bytes, depending on how well the data can be compressed. Valid values are:

Mirrored status The status of the mirrored unit. Valid values are:

Multipath Indicates that the system has multipath connections to the disk unit. Valid values are:

Name The unique ten-character name for the unit which is assigned by the system.

ORIGINNODE The host name of the monitored system. Valid entries are alphanumeric strings with a maximum length of 64 characters.

Parity Indicates whether this unit is device parity protected. Valid values are:

Percent_Busy The approximate percentage of time that the disk unit is busy. Set to NA if the disk is not configured or its use cannot be determined. Valid values range from 0-100.

Percent_Used The percent of the capacity that is currently used. If the capacity is zero then this value is zero. Valid values range from 0-100.

Percent_Reserved The percent of the capacity that is reserved for use by the machine. This storage is not available for storing objects, redundancy data, and other internal machine data. This value is zero for non-configured units. Valid values range from 0-100.

Raid_Type The current type of RAID (device parity) array that this unit belongs to. Valid values are:

Serial number The serial number of the device containing this auxiliary storage unit. This is the ten character serial number field from the vital product data for the disk device.

Status The current status of the disk unit. Valid values are:

Unit model This is the four byte character field from the vital product data for the disk device which identifies the type of drive.

Unit number The unit number uniquely identifies each non-mirrored unit or mirrored pair among the configured units. Both mirrored units of a mirrored pair have the same unit number. The value of the unit number is assigned by the system when the unit is allocated to an ASP. For unallocated units, the unit number is set to zero.

Unit type This is the four byte character field from the vital product data for the disk device which identifies the type of drive.