Creating unique device identifier for arrays and logical disks is required to enable end-to-end corelation of LUNs (as seen by the hosts) to the storage arrays. The device identifier creation involves specifying vendor SCSI pages, bytes to be read, and the formulas.

Device identifiers formulas

The following table lists sample values that are provided for SCSI pages and bytes. You need to enter the values on Device Identifier panel of Storage Insight SDK Add-on. By default, only one field is listed on this page, and no field values are selected. Additional fields can be added. You can add up to four fields.

Enclosure identifier formula: As per the above example, for Field 1, on the SCSI page 0x80, first eight bytes are read in Binary format. The formula is as follows:

%s${VENDOR}_%s${PRODUCT}_%s${Field1}

The enclosure identifier formula is constructed using the vendor, product, and Field1, which is the first 8 bytes from the SCSI page 0x80. The format specifier %s specifies that the field following the format specifier is obtained by applying the specifier to it.