Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
inlining... Oh, If you have sata, I do not speak SATA yet; so in that case my advice might be "deprecated"... J.I.C.! Tom Moyer wrote: my dvd drive is only like 2 monthes old. It is a Memorex Dual Layer DVD+/- RW I think it is fairly fast. I guess now I'm just wondering would it be worth my time to make my gentoo drive my primary master, a second hard drive the primary slave, the last hard drive the secondary slave, and the dvd burner the secondary slave. Dual-layers have been being slower than singles -- I am not sure whether this is still true or not .. (BTW CD_1x=150KB/sec, DVD_1x=~1350KB/sec.) I repeat: if the specs on your dvd Data Throughput are rougly as fast as your hdisk, then the two busyest hdisks should be on different channels, otherwise, put the two busyest on the same chanel & the dvd on the other with your slowest hdisk. Note re dvd speed: I mean the interface's speed, which is NOT necessarily the same as the dvd's 'speed'; check your documentation *carefully* for specs. I my experience it is usually Not in the specs, alas... Thus, presume that your dvd'd interface is probably *much* slower than yourhdisk's. (Anyone who *knows* that I am wrong, *please* jump in and correct me!) And with a blazingly fast dvd, it works faster to hdisk if hdisk is on other channel, but unless dvd is *Blazingly* fast, this Will Not matter -- hdisks are much (!!) faster than opticals (unless this has changed in the last 6 months or so). I'd assume it doesn't matter. Myself, I keep the internal optical as ide1m, any 3rd hdisk as ide1s; if optical is old/slow (currently), this also makes 3rd hdisk a bit slower. This means that my two busyest hdisks are on the same channel & thus slowed down a little bit by this, but for me, I still get better throughput this way. YMMV! SO: to answer your question about moving things, I doubt it; I *could* be wrong, but I doubt the move is worth-while. Without the interface-specs on the dvd, that's really the best anyone can say. Best, rgh. On 4/14/05, Robert G. Hays <[EMAIL PROTECTED]> wrote: He has a very good point. The other thought is do you have a CD or DVD in one of the channels? If so, you need to check that the cd/dvd is as fast as your hdisk, because a channel can only talk as fastas the slowest drive on it; to talk aste would be to confuse the slow device & maybe cause it to cause a computer crash or at least loss of data. If it is an older CD or DVD, especially CD, there is a good chance that it will slow down the hdisk on the same channel, so you need to take that into account while you are deciding which goes where for what use. His point is still valid. Especially if you have a fast cd/dvd or none. rgh. Kashani wrote: om Moyer wrote: lso from one response: "Put the drives on separate channels." Why? I want to use all three for Gentoo if possible. y mentioning it was more of a pointer for you to think about which drives you were going to be using most often rather than /dev/hd? ascetics. If you have the two heavily used drives on the same IDE channel you'll see some slow downs on your I/O. kashani -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
drives on separate channels: ide busses que commands serially, and wait for responses tying up the channel. The workaround is to put your high throughput devices on separate channels, keep generally slower cdroms away from faster devices, and keep cd burners on their own channel. Yes, rather difficult to set up, so on a modern system you need to think carefully where you put devices to get the best performance, and reduce cd coaster production etc. I am not sure how sata fits into this scheme though? scsi does not suffer this problem to the same extent: the advantage of scsi is not just speed which is why they are best for busy servers. BillK On Thu, 2005-04-14 at 16:15 -0500, Tom Moyer wrote: > Alright it seems like there was some confusion. > hda (40 Gig) has only Windows XP with Grub installed to it's MBR > hdb (120 Gig) has only Gentoo (all partitions including /boot) > hdc(30 Gig) currently unused > > I would like to swap hda and hdb. > > From what I could gather all this would involve is physically swapping > the drives and then reinstalling Grub and modifying /etc/fstab to > point to new partitons. > > I don't want to swap any data across the drives I just want to have > Gentoo be the only OS installed. > > Also from one response: "Put the drives on separate channels." > Why? I want to use all three for Gentoo if possible. > > Thanks > Tom > > -- > gentoo-user@gentoo.org mailing list > -- William Kenworthy <[EMAIL PROTECTED]> Home! -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
my dvd drive is only like 2 monthes old. It is a Memorex Dual Layer DVD+/- RW I think it is fairly fast. I guess now I'm just wondering would it be worth my time to make my gentoo drive my primary master, a second hard drive the primary slave, the last hard drive the secondary slave, and the dvd burner the secondary slave. On 4/14/05, Robert G. Hays <[EMAIL PROTECTED]> wrote: > He has a very good point. > > The other thought is do you have a CD or DVD in one of the channels? > > If so, you need to check that the cd/dvd is as fast as your hdisk, > because a channel can only talk as fastas the slowest drive on it; to > talk aste would be to confuse the slow device & maybe cause it to cause > a computer crash or at least loss of data. > > If it is an older CD or DVD, especially CD, there is a good chance that > it will slow down the hdisk on the same channel, so you need to take > that into account while you are deciding which goes where for what use. > > His point is still valid. Especially if you have a fast cd/dvd or none. > > rgh. > > Kashani wrote: > > > Tom Moyer wrote: > > > >> Also from one response: "Put the drives on separate channels." > >> Why? I want to use all three for Gentoo if possible. > >> > > > > My mentioning it was more of a pointer for you to think about which > > drives you were going to be using most often rather than /dev/hd? > > ascetics. If you have the two heavily used drives on the same IDE > > channel you'll see some slow downs on your I/O. > > > > kashani > > -- > > gentoo-user@gentoo.org mailing list > > > > > > -- > gentoo-user@gentoo.org mailing list > > -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
inlining... Tom Moyer wrote: yeah but i don't think i will right away i thought I could get qemu to run Windows XP but it seems there is a bug in it that prevents it from booting correctly so I'll wait to do this for now. I figured that the system would be more organized if i moved the promary drive(120 Gig with Gentoo) to primary master (hda) instead of leaving it as primary slave (hdb). I guess it really doesn't matter though. No, if the 40G/XP drive is doing nothing as hda, and grub boots you to gentoo on hdb, and your other 30G does whatever it does, this is as good as it gets (ref two recent messages about the two channels and optical drives). Swapping won't make the channel/drives any faster, you're correct. (1/20th of one percent faster -- I doubt it, those days should be long gone.) rgh. On 4/14/05, Robert G. Hays <[EMAIL PROTECTED]> wrote: Tom Moyer wrote: I would like to swap hda and hdb. I don't want to swap any data across the drives I just want to have Gentoo be the only OS installed. Linux, including Gentoo, can run from any drive in the system. If Gentoo is not already your default boot from Grub, you can easily make it so; ask this if needed. If you want to COMPLETELY remove XP from the box, that is easy too, erase its partition and create another one (or more) there to use as you like. If, ask. If you don't want to swap any data from drive-x to drive-y, then you will not be able to use new partitions as /, /usr, /var, etc, since these are all already defined, so the newly-empty space would be, for instsance, /work or .music or whatever. I am not sure I understand the first two lines above, but if I understand #3 correctly, you __do__ want to *completely* erase XP, right? rgh. -- gentoo-user@gentoo.org mailing list -- gentoo-user@gentoo.org mailing list -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
He has a very good point. The other thought is do you have a CD or DVD in one of the channels? If so, you need to check that the cd/dvd is as fast as your hdisk, because a channel can only talk as fastas the slowest drive on it; to talk aste would be to confuse the slow device & maybe cause it to cause a computer crash or at least loss of data. If it is an older CD or DVD, especially CD, there is a good chance that it will slow down the hdisk on the same channel, so you need to take that into account while you are deciding which goes where for what use. His point is still valid. Especially if you have a fast cd/dvd or none. rgh. Kashani wrote: Tom Moyer wrote: Also from one response: "Put the drives on separate channels." Why? I want to use all three for Gentoo if possible. My mentioning it was more of a pointer for you to think about which drives you were going to be using most often rather than /dev/hd? ascetics. If you have the two heavily used drives on the same IDE channel you'll see some slow downs on your I/O. kashani -- gentoo-user@gentoo.org mailing list -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
yeah but i don't think i will right away i thought I could get qemu to run Windows XP but it seems there is a bug in it that prevents it from booting correctly so I'll wait to do this for now. I figured that the system would be more organized if i moved the promary drive(120 Gig with Gentoo) to primary master (hda) instead of leaving it as primary slave (hdb). I guess it really doesn't matter though. On 4/14/05, Robert G. Hays <[EMAIL PROTECTED]> wrote: > Tom Moyer wrote: > > >I would like to swap hda and hdb. > >I don't want to swap any data across the drives I just want to have > >Gentoo be the only OS installed. > > > Linux, including Gentoo, can run from any drive in the system. > > If Gentoo is not already your default boot from Grub, you can easily > make it so; ask this if needed. > > If you want to COMPLETELY remove XP from the box, that is easy too, > erase its partition and create another one (or more) there to use as > you like. If, ask. > > If you don't want to swap any data from drive-x to drive-y, then you > will not be able to use new partitions as /, /usr, /var, etc, since > these are all already defined, so the newly-empty space would be, for > instsance, /work or .music or whatever. > > I am not sure I understand the first two lines above, but if I > understand #3 correctly, you __do__ want to *completely* erase XP, right? > > rgh. > > -- > gentoo-user@gentoo.org mailing list > > -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
Tom Moyer wrote: Also from one response: "Put the drives on separate channels." Why? I want to use all three for Gentoo if possible. My mentioning it was more of a pointer for you to think about which drives you were going to be using most often rather than /dev/hd? ascetics. If you have the two heavily used drives on the same IDE channel you'll see some slow downs on your I/O. kashani -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: Slightly Complex Hard Drive Question
Tom Moyer wrote: I would like to swap hda and hdb. I don't want to swap any data across the drives I just want to have Gentoo be the only OS installed. Linux, including Gentoo, can run from any drive in the system. If Gentoo is not already your default boot from Grub, you can easily make it so; ask this if needed. If you want to COMPLETELY remove XP from the box, that is easy too, erase its partition and create another one (or more) there to use as you like. If, ask. If you don't want to swap any data from drive-x to drive-y, then you will not be able to use new partitions as /, /usr, /var, etc, since these are all already defined, so the newly-empty space would be, for instsance, /work or .music or whatever. I am not sure I understand the first two lines above, but if I understand #3 correctly, you __do__ want to *completely* erase XP, right? rgh. -- gentoo-user@gentoo.org mailing list
[gentoo-user] Re: Slightly Complex Hard Drive Question
Alright it seems like there was some confusion. hda (40 Gig) has only Windows XP with Grub installed to it's MBR hdb (120 Gig) has only Gentoo (all partitions including /boot) hdc(30 Gig) currently unused I would like to swap hda and hdb. >From what I could gather all this would involve is physically swapping the drives and then reinstalling Grub and modifying /etc/fstab to point to new partitons. I don't want to swap any data across the drives I just want to have Gentoo be the only OS installed. Also from one response: "Put the drives on separate channels." Why? I want to use all three for Gentoo if possible. Thanks Tom -- gentoo-user@gentoo.org mailing list
