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Server Storage

How to find out HP EVA model

Sep 15th, 2009 | By Steve Soe | Category: How-To, Server Storage

Here is the table regarding EVA models:

Model IOSCAN output
EVA3000 HSV100(A/P) or HSV101(A/A)
EVA5000 HSV110(A/P) or HSV111(A/A)
EVA4xxx/6xxx HSV200
EVA8xxx HSV210
EVA4400 HSV300

Note:
A/P – Active/Passive, for VCS 3.xxx
A/A – Active/Active, for VCS 4.xxx
VCS – Virtual Controller Software (i.e., EVA firmware)
HSV – Hierarchical Storage Virtualization (controller)

If you have HP-UX OS, use diskinfo -v to get the f/w revision.



What is difference between RAID 5 and RAID 6

Sep 15th, 2009 | By Steve Soe | Category: Server Storage

RAID 5–Striped set with distributed parity. Distributed parity requires all drives but one to be present to operate; drive failure requires replacement, but the array is not destroyed by a single drive failure. Upon drive failure, any subsequent reads can be calculated from the distributed parity such that the drive failure is masked from the [...]