Carsten Otte wrote: > Daniel wrote: > >The larger the number of cyls for the device, the worse the > ratio gets :(. > > That's not true: CDL uses track0 and track1 for internal purposes, the > rest (number of 4k blocks that fit on a track multiplied with amount of > tracks) is available for partitions. For people who do not like that > overhead can just use LDL which only uses 2 blocks (8 kilobytes) as > overhead.
Sorry to be unclear, I was referring to the 49152 bytes/track (12 * 4K) vs. the true 56664 bytes/track for emulated/real ECKD devices, not the CDL/partition overhead. I said, "The CDL, partition, filesystem/journal overhead is really quite tiny in comparison." The whole comment about the ratio getting worse as volume size increases was due to: A1. CDL/partition overhead is fixed, no increase in overhead. A2. Journal overhead is fixed, unless you use a larger journal. A3. Filesystem overhead may vary with the data, but again tiny compared to... B1. A constant lost of 112,680 bytes for every ECKD cylinder (13.25%), which is what I was sniveling about. ~ Daniel ----------------------------------------------------------------------- This message is the property of Time Inc. or its affiliates. It may be legally privileged and/or confidential and is intended only for the use of the addressee(s). No addressee should forward, print, copy, or otherwise reproduce this message in any manner that would allow it to be viewed by any individual not originally listed as a recipient. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is strictly prohibited. If you have received this communication in error, please immediately notify the sender and delete this message. Thank you. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
