DragonFly BSD
DragonFly users List (threaded) for 2005-12
[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]

Re: Waiting 15 seconds for SCSI devices to settle *groan*

From: Bill Hacker <wbh@xxxxxxxxxxxxx>
Date: Fri, 02 Dec 2005 13:29:05 +0800

Simon 'corecode' Schubert wrote:

Emiel Kollof wrote:

That and 15 seconds seems a bit too long. Know of any hardware that actually needs that long to settle in? (and don't you guys go dig up the most antiquated SCSI peripherals that actually do need 15 seconds ;) ) If yes, I'll just shut up about this.

my cd writer does. but i have the delay set to 3 secs, and it just reports in later, no big deal. so i'm basically for reducing this timeout.


Still needed for large arrays, when staggered spin-up is used to reduce PS load.
Modern drives generally are designed to ramp-up more gently anyway,
so using it is not always required.

As an inveterate SCSI user, I would still vote for shortening the time to *zero* anyway.
The diminishing universe of SCSI users may then rebuild if/as/when needed with a longer period.

Optioning the SCSI device (HDD, anyway) to start at power-ON means it will usually be
ready well before the MB BIOS and other devices have finished POST, so it is seldom an issue
even with multiple hardware RAID.


Bill Hacker

[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]