HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Utilities and Exercisers
117HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
Resource performance statistics
VTDPY displays resource performance statistics by using a block of tabular data
in the Resource screen only. Resource name and statistical data is located along
the left side of the screen (see Figure 21 on page 101). Table 32 defines the
resource name and statistical fields.
MDATA Thread that processes metadata for nontransportable disks.
NULL Process that is scheduled if no other process can be run.
NVFOC Thread that initiates state change requests for the “other controller” in
a dual-controller configuration.
REMOTE Thread that manages state changes initiated by the
“ other controller”
in a dual-controller configuration.
RMGR Thread that manages the data buffer pool.
RECON Thread that rebuilds the parity blocks on RAID 5 storagesets if needed
and manages mirrorset copy operations if necessary.
VA Thread that provides logical unit services, independent of the host
protocol.
VTDPY Local program that provides a dynamic display of controller
configuration and performance information.
Table 31:
VTDPY Thread Descriptions (Continued)
Thread Description
Table 32: Resource Performance Statistics Definitions
Column Contents
Resource
Name
Name of the physical resource.
Free Current resources not being used.
Need Number of resources required for the specific transaction.
Wait Number of transactions waiting to be accomplished.
Buffers Number of cache data buffers available for holding data.
VAXDs Number of value-added transfer descriptors that manage the actual
device I/O operations within the controller.
WARPs Number of write algorithm request packets that manage data for
RAID 5 writes.
RMDs Number of RAID member data descriptors that manage data for
RAID 5 writes.