Re: New Mailserver...

--On January 16, 2008 8:24:35 PM +0100 Michelle Konzack <linux4michelle@freenet.de> wrote:

> Am 2008-01-16 19:37:10, schrieb Marc Haber:
>> On Sat, Jan 12, 2008 at 12:17:53PM +0100, Michelle Konzack wrote:
>> > I am archiving millions of messages and they must be availlable 24/7
>> > which mean, I can not have any trust in IDE-Drives (even SATA drives
>> > with IDE Hardware)
>>
>> Define "IDE Hardware".
>
> Real SCSI drives have more physical heads, the motors are more
> powerfull and the "Lager" (wie heisen die auf englisch?) are
> made for permanent load. Also you should not boot and shutdown
> SCSI-Drives very often like Desktop dirves/computers.

As another poster mentioned this can be independent of interface, drive manufacturers have long called these higher reliability drives "Enterprise" or "Server" grade. These more robust drives can actually withstand a LOT more on/off cycles as they will include a head load/unload mechanism which lifts the drive heads off the platters. A lot of cheaper consumer/desktop grade drives do not have this so every startup/shutdown it's just like the early days where the drive scrambles the head into the "parking cylinder" before it can come crashing down onto data, then it's allowed to slide to a stop.

>
> AND: My 300 GByte 15.000RpM drives are consuming nearly twice
> the energie like a 1 TByte Hitachi Deskstar.

That's a function of the spindle speed/RPM and also the voice coil (head servo) positioning mechanisms. Mostly the spindle speed though.

>
> Thanks, Greetings and nice Day
> Michelle Konzack

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