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XP 256 stripe size

Junxiu Liu
Occasional Visitor

XP 256 stripe size


What is XP 256 stripe size in a RAID5/RAID1 configuration? From my XP course, XP 512 has 576K stripe size in RAID 5 config and 384K in RAID 1 config
4 REPLIES
恐龍
Occasional Visitor

Re: XP 256 stripe size


Hello,

According to the Theory Of Operation Manuals, the XP256 & XP512 Stripe size is actually 58KB (based on a 3390-3 track size), regardless of the RAID architechure used. The numbers you quoted are actually "chunk" sizes.

Regards,
Maurice Clark.
Junxiu Liu
Occasional Visitor

Re: XP 256 stripe size

The track size I was told by a friend is 48K used by IBM drive which XP emulated originally. Maybe the technique is evolving and the number 58K can do better magic

Thanks for the reply
Michael Steele_2
Honored Contributor

Re: XP 256 stripe size

HP emmulated from IBM?

The XP array is a renamed Hitachi.
Support Fatherhood - Stop Family Law
ESC Team
Advisor

Re: XP 256 stripe size

Hello,

The track size you were told is incorrect.

The emmulated track size *IS* 58K, for all R300, R400 and R450 XP disk arrays. This is the max track size for an IBM 3390-3 DASD device. This is an architechural requirement for IBM mainframe connection but transparent (although still used) for all Open Systems.

Maurice Clark.
ESC Team