nibbles & bits? sounds like a pet food ! HAPPY FRIDAY :) -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Friday, February 08, 2002 7:45 AM To: [log in to unmask] Subject: Re: [HP3000-L] Sectors to Mbytes Yup, U B right! Because, the address space on PA-RISC machines is divided into units of 2048 bytes. HP-UX allocates main memory and file space in 2048-byte physical pages, but MPE/iX manages file systems space in logical pages which are 4096 bytes, which are twice as large, for its own performance reasons. Oops. See? HP-UX is infecting me! Sorry. S See my revised diatribe below... (The rest of us will hum along quietly...) Four bits = one nibble. Two nibbles = one byte. Eight bits = one byte. The HP 3000/MPE uses 8-bit ASCII. Two bytes = logical word on "Classic" HP 3000s. Two bytes = "halfword" on PA-RISC HP 3000's. Four bytes = logical word on PA-RISC HP 3000's. 4096 bytes = one logical "page" on PA-RISC HP 3000's (HP-UX = 2048 bytes per page). One Kilobyte = 1024 bytes on all computers. One Megabyte = 1,048,576 bytes on all computers, and... MPE sectors are 256 bytes wide, so... One Megabyte = 4096 MPE Sectors (about four-thousand sectors). One Gigabyte = 1,073,741,824 bytes on all computers, so... One Gigabyte = 4,194,304 MPE Sectors (about four-million sectors). One Terabyte = 1024 Gigabytes on all computers, so... One Terabyte = 1,099,511,627,776 bytes, so... One Terabyte = 4,294,967,296 MPE Sectors (about four-billion sectors). Chris -----Original Message----- From: Craig M. Lalley [mailto:[log in to unmask]] Sent: Friday, February 08, 2002 8:44 AM To: [log in to unmask]; [log in to unmask] Subject: RE: [HP3000-L] Sectors to Mbytes Chrisg said; "2048 bytes = one logical "page" on PA-RISC HP 3000's." Actually, I believe it is 2048 words = 4096 bytes = one logical "page" on PA-RISC HP3000's. IMHO Craig M. Lalley Systems Performance Specialist Lund Performance Solutions Phone (541) 812-7600 | Email [log in to unmask] Fax (425) 920-4995| Web www.lund.com NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient or believe that you may have received this communication in error, please reply to the sender indicating that fact and delete the copy you received. In addition, you should not print, copy, retransmit, disseminate, or otherwise use the information. Thank you. -----Original Message----- From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf Of [log in to unmask] Sent: Friday, February 08, 2002 9:26 AM To: [log in to unmask] Subject: Re: [HP3000-L] Sectors to Mbytes HP 3000 SIZING: just for fun ... Four bits = one nibble. Two nibbles = one byte. Eight bits = one byte. The HP 3000/MPE uses 8-bit ASCII. Two bytes = logical word on "Classic" HP 3000s. Two bytes = "halfword" on PA-RISC HP 3000's. Four bytes = logical word on PA-RISC HP 3000's. 4096 bytes = one logical "page" on PA-RISC HP 3000's (HP-UX = 2048 bytes per page). One Kilobyte = 1024 bytes on all computers. One Megabyte = 1,048,576 bytes on all computers, and... MPE sectors are 256 bytes wide, so... One Megabyte = 4096 MPE Sectors (about four-thousand sectors). One Gigabyte = 1,073,741,824 bytes on all computers, so... One Gigabyte = 4,194,304 MPE Sectors (about four-million sectors). One Terabyte = 1024 Gigabytes on all computers, so... One Terabyte = 1,099,511,627,776 bytes, so... One Terabyte = 4,294,967,296 MPE Sectors (about four-billion sectors). Have a great weekend.. Chris ---------- Paul, A sector is 256 bytes, so 4 sectors equal one Kilobyte or (256 * 4 * 1024) = 1 Meg. Thanx, Jon -----Original Message----- From: HP-3000 Systems Discussion [mailto:[log in to unmask]]On Behalf Of Paul Thompson Sent: Friday, February 08, 2002 8:47 AM To: [log in to unmask] Subject: [HP3000-L] Sectors to Mbytes I've had a brain lapse...can someone remind me of the calculation of converting disc sectors to megabytes... TIA Paul Paul Thompson HP3000/Ecometry Analyst Spark Response Tel: 0191 4959999 ext:5416 Email: <mailto:[log in to unmask]> Website: <http://www.sparkresponse.com/> * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * ********** Posted from www.3kworld.com * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *