On Sunday 13 August 2006 16:49, Peter Selinger wrote: > Not all UPS hardward and not all drivers support ondelay/offdelay. In > any case, you should let your system shutdown script kill the UPS, at > the very end, after all the disks have been mounted read-only, and > just before the system is normally halted. This will turn off your > computer safely. -- Peter
Any UPS worth it's salt has ondelay/offdelay (of some form) for 2 reasons, 1) without it you can get into a situation where the UPS will not power cycle the load if the mains comes back on at the wrong time, and 2) not all operating systems re-mount disks read only at shutdown (eg FreeBSD runs shutdown procedures then the kernel flushes and un-mounts the disks) As for ondelay/offdelay having the same value - NUT disallows it and makes sure that ondelay is longer. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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