关于Disk Power Saving Status状态？

[Harry289826411]

平时没注意过这个状态，是否有官方推荐配置！

[born_chen · Accepted solution]

就是磁盘省电的一些选项。

关于一些限定条件，LZ可以参考这个。

   

Issue	What are the conditions for enabling Power Saving on VNX RAID group?
		Environment	Product: VNX			Resolution	In order for eligible RAID group disks to transition to the low power state, the following conditions must be met:   Power savings settings for the RAID group and storage system must be enabled. All disks in the RAID group must be qualified and eligible. All disks in the RAID group have been idle for at least thirty minutes. Replication software is not installed on any LUN in the RAID group. The RAID group does not include MetaLUNs.

[Harry289826411]

多谢支持！

这个设置是自动么,开始部分日立硬盘没配置RAID Group,并且只有这部分这个功能是Enable的Yes状态,那这个问题我可以忽略...

[born_chen]

[Roger_Wu]

关于disk power saving (spin down)这几份白皮书里有详细说明：

http://www.emc.com/collateral/software/white-papers/300013146-unified-storage-fundamentals.pdf

http://www.emc.com/collateral/hardware/white-papers/h6632-clariion-disk-drive-spin-down-wp.pdf

http://www.emc.com/collateral/hardware/white-papers/h6668-clariion-spin-down-celerra-wp.pdf

如果磁盘(或RAID group)在一定时间内（30分钟）没有I/O访问，那就降速甚至停止电动马达起到省电的目的。一般热备份盘或unbound的盘可以考虑开启，一些买来VNX、CLARiiON只用来做周期性备份或轻量文件访问（非上班时间无I/O）的也可以开启。如果是普通的数据库、交互型应用的，在生产LUN上开不开都一样，通常很少30分钟都没有I/O的。