EMC Sym Disk Types 1

[gatetec]

When we say Tier 1 and Tier 2 disks, what are they referring to?
I know Tier 1 disk is mainly for database and application filesystems. What is Tier 2 disk for? Can Tier disk 2 be used for NFS mount point and/or temporary database dump files in UNIX hosts?

thx much

 

[jjjon]

It all depends on how your storage is structured within your organisation. Tier 1 would typically be your most resilient (and more expensive) storage system - e.g. DMX, whereas your Tier 2 may be served by a cheaper storage system - e.g. Clariion.
You would certainly put your database dumps on Tier 2 storage if you can - you don't want something like a backup or dump to be taking up valuable disk space on the more expensive disk which could be used for your more mission critical systems. What goes onto Tier 1 and Tier 2 would be a policy decision within your organisation.

Also you could have both Tier 1 and Tier 2 on the same storage system. Tier 1 might be faster fibre disks, whereas Tier 2 may be something like higher capacity SATA disk, assuming your storage array can handle this.

J

 

[gatetec]

thx much