HP VMA-series Memory Arrays - Manual (Page 215)

AM456-9026A HP VMA SAN Gateway User’s Guide 215
Returns
The vcounts utility returns the following counters:
IRQ calls The total interrupt request handler calls to the
HP VMA Array device driver.
IRQ calls for V1010 The total calls to the HP VMA Array device
driver where work was done.
IRQ calls for errors The total of DMA errors returned as well as
PCIe link loss errors.
Completed I/O bytes The total bytes read/written from/to a HP
VMA Array.
Completed read bytes The total bytes read from the HP VMA Array.
Completed write bytes The total bytes written to a HP VMA Array.
Completed I/O's The total I/O read / write requests from and to
HP VMA Array. This is not the individual
DMA descriptors completed, but for each of
the user requested I/Os.
Completed read I/O's The total I/O read requests from a HP VMA
Array. This is not the individual DMA
descriptors completed, but for each of the user
requested I/Os.
Completed write I/O's The total I/O write requests to a HP VMA
Array. This is not the individual DMA
descriptors completed, but for each of the user
requested I/Os.
Failed read I/O's The total failed I/O read requests from a HP
VMA Array. This is not the individual DMA
descriptors failed, but for each of the user
requested I/Os.
Failed write I/O's The total failed I/O write requests to a HP
VMA Array. This is not the individual DMA
descriptors failed, but for each of the user
requested I/Os.
Average read bytes The rough average of read I/O request sizes.
Average write bytes The rough average of write I/O request sizes.
Unaligned host buf
reads The total I/O read requests from a HP VMA
Array, but only incremented when an
unaligned host address required special buffer
byte copying to service the DMA request. For
more information, see
Unaligned Bounce
Buffers for Reads and Writes on page 216.