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- Submitted-by: alpha@cup.portal.com
-
- I'm new to Unix but have 'been around' for 30 years or so.
- When IBM graduated from punch cards to tape and disk files, they
- specified a 'unit record', analogous to a card, of 128 bytes.
- The term 'block' was generally the minimum data that could be
- read/written to an i/o device, usually a tape or disk. IBM tapes
- usually had a blocksize of one record (i.e. 128 bytes). Disk
- subsystems have block sizes of some power of 2 unit records,
- 128, 256, 512 or 1024 bytes. It seems to me that blocksize is
- implementation specific and of no real use to the user in terms
- of disk usage reports. The user thinks in terms of bytes, kilobytes,
- megabytes, and now gigabytes and not in block sizes. He doesn't care.
- Simple reports should be in kilobytes (with a fractional part perhaps).
- A particular file might have a 'size' of 25.5 KB. A report for a
- 100 megabyte disk partition might be 102400 KB or 100 MB. As
- our disks are getting larger, GB reports might be supported.
- If the reporting programs are outputting to other than stdout,
- I would prefer the report to be in unit records (128 bytes).
- If to stdout, reports in KB. Command line options can override
- defaults and format the report any way the user likes.
-
- My two cents.
-
- Joe Wright alpha@cup.portal.com
-
- Volume-Number: Volume 24, Number 94
-
-