Strange line in the root crontab: why?
Mark Brukhartz
mdb at i88.isc.com
Sun Jul 22 03:47:25 AEST 1990
In article <932 at gistdev.gist.com> flint at gistdev.gist.com (Flint Pellett) writes:
>I found this line in the root crontab on our 3B2/600, which is now
>running R3.2.2. [ ... ]
>
>0 0 * * * dd if=/dev/mem of=/dev/null 2>/dev/null
It corrects single-bit memory errors before they grow into uncorrectable
double-bit errors. The command, of course, reads all of physical memory.
The memory hardware then detects any single- or double-bit errors and
corrects the single-bit errors.
Mark Brukhartz
INTERACTIVE Systems Corporation
Services and Technologies
mdb at i88.isc.com
...!{amdahl, ico, ima, ism780c, masscomp, nucsrl, sun}!laidbak!mdb
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