topic Re: disk cylinder? in Disk

disk cylinder?

Hanry Zhou — Mon, 22 Sep 2014 00:55:26 GMT

which one calculate the disk cylinder?

#heads*sectorsize * #sectors

#heads*#tracks*#sectorsize?

#heads*sectorsize?

#tracks*#heads*sectorsize*sectors?

P.S. This thread has been moved from Storage>General to Storage > disk. -HP Forum Moderator

Re: disk cylinder?

Ross Zubritski — Fri, 28 Feb 2003 16:28:11 GMT

Does this forum software have a ban button?

Regards,

RZ

Re: disk cylinder?

Chris Vail — Fri, 28 Feb 2003 16:32:17 GMT

Cylinders is another name for tracks. Its almost an obsolete term these days.

Chris

Re: disk cylinder?

Dave La Mar — Sat, 01 Mar 2003 00:48:40 GMT

Roger -
Not sure in HP world, but tracks and cylinders are still alive and well in IBM mainframe environments.

Totally dependent upon the disk type.
We calculate calculate thusly -
for a 3390
15 tracks per cylinder
3338 cylinders for a 3390
50070 tracks

While track calculations may not be used extensively in hp-ux, they still are on other platforms.

Best regards,

dl

Re: disk cylinder?

Bill Hassell — Sun, 02 Mar 2003 03:37:38 GMT

Disk cylinders are virtually obsolete due to relative addressing, track sparing and variable sector layouts. If you are using any type of disk array, tracks and cylinders, even the physical disk are totally hidden behind the controller's firmware. Most modern disks are addressed by absolute sector number and the drive itself figures out just where the sector is located.