Owner manual

AM456-9026A HP VMA SAN Gateway User’s Guide 221
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:
Returns
The vpartial utility returns the following information.
my-srv1 [my-cluster1: master] # vpartial
Violin Memory, Inc.
Device: /dev/vtmsa
Index: 0
-- Target Unaligned / Partial Counts --
Completed read I/O's: 956255750
Unaligned host buf reads: 1960
Unaligned host buf bounce reads: 3
Requested DMA page reads: 956256695
Flash partial page reads: 32006
Completed write I/O's: 332254
Unaligned host buf writes: 1665
Unaligned host buf bounce writes: 0
Requested DMA page writes: 332267
Flash partial page writes: 1665
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.