The following message is a courtesy copy of an article that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well.
Anne & Lynn Wheeler <[EMAIL PROTECTED]> writes: > say 6bits of storage key per 4k bytes is lost in the noise? (2k > storage keys as well as 2k virtual pages having been dropped around > 3081 xa time-frame) ... if you wanted to worry about something > ... there was 16bit ecc for every 64bit double word (or 2bits per 8bit > byte ... as opposed to parity bit per 8bit byte) ... optimizations > were trying to get failure coverage (better than simple 1bit/byte > parity) with less than 80bits (for 64bit of data) ... like 78bits, > 72bits, etc ... thread from vmshare computer conferencing on how to get old 2k key based operating systems to run under vm on 3081k having only support for 4k keys. http://vm.marist.edu/~vmshare/browse?fn=2K_SCP&ft=MEMO ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
