Attribute

Definition

Media MB Capacity

Maximum media capacity, in megabytes.

Note – Reported value varies by drive vendor and other factors.

Media MB Avail Post

Unused media capacity, in megabytes; this value is provided after the exchange completes.

Note – Reported value varies by drive vendor and other factors.

Exchange Encryption Used

Encryption method used by the drive for the exchange. Available for StorageTek enterprise drives only. Possible values:

Exchange FSC

Four-byte hexadecimal fault symptom code (FSC). For example, FD55, S053, etc. Reported only if an error occurred during the exchange.

Exchange Write Inefficient

Indicates whether the media met the write efficiency standard for the media type. Possible values: Yes or No.

Exchange Read Marginal

Indicates whether the media met the read margin standard for the media type. Possible values: Yes or No.

Exchange Write Efficiency

Write efficiency for the exchange, based on capacity over distance. A high value is desirable.

Exchange Read Margin

Amount of error correction code (ECC) read margin remaining on the media, as reported by the drive during the last mount. Reported as a percentage. A high value is desirable.

If STA determines that this value has gone below a threshold for this drive type, the Exchange Read Marginal attribute is set to Yes.

Time Spent Reading

Total time the drive spent reading data during the exchange

Time Spent Writing

Total time the drive spent writing data during the exchange

Time Spent Reading or Writing

Total time the drive spent reading and writing data during the exchange

Read MB/sec

Read rate for the time spent actively reading; idle time is excluded. Expressed in megabytes per second. Calculated as:

compressed MB read / total read time 

Write MB/sec

Write rate for the time spent actively writing; idle time is excluded. Expressed in megabytes per second. Calculated as:

compressed MB written / total write time 

R/W MB/sec

Throughput rate for the time spent actively reading and writing; idle time is excluded. Expressed in megabytes per second. Calculated as:

(compressed MB read + compressed MB written) / 
(read time + write time)

Read Mount Ratio

Time spent reading divided by exchange time.

Write Mount Ratio

Time spent writing divided by exchange time.

R/W Mount Ratio

Time spent reading or writing divided by exchange time.