IT Answers » Tiered storage

Mix luns from 300 and 146gb drives when provisioning storage capacity

Ldavis100 — Mon, 16 May 2011 13:15:49 +0000

We need to add capacity to our EMC DMX4 which currently has 146 and 300gb 15k drives. The 146gb drives may be difficult to get so my questions is given todays technology with drive IOPS, should it be a concern if I need to expand the amount of disk to an existing host that currently has 146gb drives with luns from some 300gb drives? Should mixing luns assigned to a host from diffenernt drive geometries be a problem for relatively high IO applications of mixed random reads and writes?

Configuring tier 0 on a SAN

SearchStorageATE — Thu, 09 Jul 2009 15:43:39 +0000

Can I configure Tier 0 on a SAN ?

Second tier storage: Putting our DFSMS/HSM ML1 data on FATA-disk

SearchStorageATE — Fri, 14 Nov 2008 19:29:58 +0000

We are mainframe users (IBM Z9 and Z10). All DASD is IBM DS8300 and we are looking at the implementation of a second tier.

We would like to put our DFSMS/HSM ML1 data on FATA-disk. After some calculations we found out that a 150 TB second tier buffer would be big enough to store one year of ML1 data. Older data will be sent to a virtual tape system (SUN/STK VSM).

What are people’s opinions as to whether this is a good thing to do?