Date: Wed, 04 Oct 2000 10:01:20 -0400 From: "Andresen,Jason R." <jandrese@mitre.org> To: Nader Turki <nturki@adelphia.net> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: 2 HD's Message-ID: <39DB3830.9126DB8E@mitre.org> References: <39DB6512.395BA221@adelphia.net>
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Nader Turki wrote: > > Hi there, > I know that this is not the right list for such a question. But i'm a > newbie and sure thee are many sys admins on this list who can answer my > question :) > > I have 2 HD's > 1. 9GB SCSI Ultra2 7200RPM > 2. 36GB SCSI Ultra2 10,000RPM > > You see they both used to be 7200RPM, then i had bad sectors and IBM > replaced the HD to a faster/better one. > > So, is it better to use just the 36GB 10,000RPM > Or, I can use both and there will be no difference between the 7200 and > 10000RPM? > > I mean I usually have /, /var, /tmp, /usr on the 9GB and /home on the > 36GB > But now I have a faster 36GB so i dunno if it's gonna be the same or > it's stupid to use the old one (7200RPM) with the new one. > > I'll appreciate it if someone could help me. > Well, the 7200 will be slower than the 10,000, but that is not a reason to dump it entirely. Unless you are striping between the two drives, you can use the 10,000 at nearly its full speed (minus any bus contention issues that shouldn't be a problem with only two drives on the SCSI bus) and just leave the 7200 as a slower data drive or something. BTW, if the 36GB drive is the IBM DDYS-T36950N, be sure you have adequate cooling on the drive. I got one of those and it runs hotter than fire if you don't have a fan blowing across it. One final issue: if your new drive is a SCSI-3 Ultra/160 and your old one is a SCSI-2 Ultra or something, the bus will be forced to the lower speed, slowing down the bigger drive (independant of the RPM rating), however if your controller is only SCSI-2 Ultra (2940UW for instance) it won't be able to use the Ultra/160 even if you take the slower drive off of the bus. -- _ _ _ ___ ____ ___ ______________________________________ / \/ \ | ||_ _|| _ \|___| | Jason Andresen -- jandrese@mitre.org / /\/\ \ | | | | | |/ /|_|_ | Views expressed may not reflect those /_/ \_\|_| |_| |_|\_\|___| | of the Mitre Corporation. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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