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Monitoring System Status
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To display drive errors:
1
From the System Menu, select
Display Drives
and press
Enter
.
The Display Drives screen displays.
2
If a drive has an E next to it, select the drive and press
Enter
to display the error information.
Some errors are primarily for information purposes to help you diagnose drive and enclosure problems.
For more information about SMART errors, refer to the drive manufacturer’s specifications. For more
information about FC errors, refer to: www.t11.org, click Drafts, find the FC-FS 1.6 T11/02-018v0 dpANS
- Fibre Channel Framing and Signaling Interface document, and go to section 21.
To reset the error statistics, select Reset drive error statistics and press Enter.
3
Press
Esc
to return to the list of drives.
D.7 Displaying Overall Statistics
You can display two types of aggregate statistics for all partition LUNs:
• General statistics (Similar statistics are also available for individual partition LUNs. For more
information, see C.3.2.2, ”Viewing Partition Statistics”, on page 136.)
– I/O operations per second (IOPS)
–
Bandwidth (in millions of bytes per second)
– Number of read operations
– Number of write operations
–
Total sectors (512 bytes) read
– Total sectors written
–
Total current command queue depth across all LUNs
• Host read/write histogram that shows how many host reads and writes fell into a particular size
range. The I/O ranges are based on powers of two:
– 1 Sector
– 2–3 Sectors
– 4–7 Sectors
– 8–15 Sectors
– 16–31 Sectors
– 32–63 Sectors
– 64–127 Sectors
– 128–255 Sectors
– 256–511 Sectors
– 512–1023 Sectors
– 1024–2047 Sectors
– 2048 (and larger) Sectors
Tip: This information may be helpful in interpreting performance based on individual system configuration
such as HBA, driver configuration, SAN configuration, and host operating system configuration. The
statistical information can be useful to profile applications and their usage of a partition, which could be
used to determine if additional arrays would increase performance and what type of RAID level is
applicable to your needs. You may want to analyze the performance of the same application using