HP VMA-series Memory Arrays - Manual (Page 224)

224 AM456-9007B Rev 02 HP VMA SAN Gateway Installation and User Guide
vpartial
The vpartial utility displays the number of read/write I/O requests processed
and the number of partial 4kB flash pages.
Syntax
vpartial [ <device_index> ]
Example
The vpartial utility returns information similar to the following example when
run on a Linux host:
Returns
The vpartial utility returns the following information.
# vpartial
HP, Inc.
Version: vtms-linux-utils-D4.5.4, 05/23/2011
Device: vtmsa
Index: 0
-- Target Unaligned / Partial Counts --
Completed read I/O's: 1995280246
Unaligned host buf reads: 0
Flash partial page reads: 10326
Completed write I/O's: 1903433508
Unaligned host buf writes: 0
Flash partial page writes: 4535553
Completed read I/O's Displays 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.
Unaligned host buf
reads Displays 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.
Flash partial page
reads Incremented when a DMA descriptor for read
is less than a flash page (4kB) in size.