Dell PowerVault ME4 Series Storage System CLI Guide

tier-statistics

This basetype is used by show tier-statistics and show pool-statistics.

Table 1. tier-statistics properties
Name	Type	Description
serial-number	string	The serial number of the tier or pool.
pool	string	The name of the pool.
tier	string	Archive: The lowest storage tier, which uses midline spinning SAS disks (<10k RPM, high capacity). Performance: The highest storage tier, which uses SSDs (high speed). Read Cache: The tier that provides read cache for a storage pool. Standard : The tier that uses enterprise-class spinning SAS disks (10k/15k RPM, higher capacity).
tier-numeric	uint32	Numeric equivalents for tier values. 0: N/A 1: Performance 2: Standard 4: Archive 8: Read Cache
pages-alloc-per-minute	uint32	The rate, in pages per minute, at which pages are allocated to volumes in the pool because they need more space to store data.
pages-dealloc-per-minute	uint32	The rate, in pages per minute, at which pages are deallocated from volumes in the pool because they no longer need the space to store data.
pages-reclaimed	uint32	The number of 4 MB pages that have been automatically reclaimed and deallocated because they are empty (they contain only zeroes for data).
num-pages-unmap-per-minute	uint32	The number of 4 MB pages that host systems have unmapped per minute, through use of the SCSI UNMAP command, to free storage space as a result of deleting files or formatting volumes on the host.
resettable-statistics	Embedded; see resettable-statistics.