Tracks, stripes - looking for good documentation

I wish I knew of a generic paper, but if you check the hardware guide for say the DMX-4 you can find some descriptions of how these all related.

Also keep in mind this answer differs if you are talking about Open Systems (FBA) or Mainframe (CKD) disk structure which are discussed in the documentation.

I hope someone comes-up with a better/easier to digest answer - digging through those guides can be overwhelming.

Here is an excerpt from the DMX-4 Hardware guide:

The channel directors interact with global memory. Therefore, there is no physical meaning to cylinders, tracks, and heads on the Symmetrix logical volume from the front-end point of view. However, Symmetrix systems use a logical geometry definition for their logical volume structure. This geometry is reflected in the mode sense data available to the host.

Symmetrix systems use the following logical volume structure:
◆ Each logical volume has n cylinders
◆ Each cylinder has 15 tracks (heads)
◆ Each track has 128 blocks of 512 bytes

Therefore, a Symmetrix logical volume with n cylinders has a usable block capacity of: n * 15 * 128

n for each volume is defined during Symmetrix configuration.

To calculate the size of the logical volume:

Number of cylinders * heads * blocks * 512
(n * 15 * 128* 512)

I don't want your points !! I won't ever answer your questions

-s-

thank you bodnarg ..

what's wrong with my points ? they are not redeemable in Italy ? Aren't you still working on that kitchen of yours?

I guess American russian points are like "old" money.... they loose value quickly !

Saying that, I remember the time where the italian Lire was worth a lot... NOT. Hey, that rimes

hey ...ain't nothing wrong with American rubles