> -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of Ruslan Sivak > Sent: Friday, May 11, 2007 3:32 PM > To: CentOS mailing list > Subject: Re: [CentOS] Re: Anaconda doesn't support raid10 > > Feizhou wrote: > > > >> Originally I had boot on 2 drives raid1, with 2 more drives being > >> hotspares. Then I realized that this makes no sense, if > you can just > >> set up a raid1 with 4 drives (where each drive is a copy of each > >> other). Didn't really know if it was supported, but looks like it > >> works. > > > > The entire use all four disks for /boot makes no sense if two disks > > belonging to the same mirror for the lvm go down. Please stop this > > nonsense about surviving everything to no benefit. You can > have three > > disks fail and still have a working /boot. For what? > > _______________________________________________ > > Feizhou, > > After thinking about it for a little bit, I see your point. > If one of > the arrays fails, the data drive is gone, and there is no > point keeping > boot after that. This means it suffices to put /boot on the > first raid1 > array. > However, as was mentioned elsewhere in this thread, by mirroring the > boot partition on all 4 drives, I don't have to worry about > which order > the drives are plugged in, and I can preserve disk symmetry. > Since the > cost of the drive is about $0.25 a GB, I think wasting the $0.10 is > worth the flexibility and peace of mind. Don't worry about it, the 4 partition raid1 makes perfect sense in your setup not for the reason you gave, but for: 1) simplicity 2) symmetry 3) flexibility 4) low to no overhead, 99.99% read partitions It provides no downside and a lot of added bonuses. So how is the performance on the striped LVM LVs? Do you see the 120MB/s throughput? Random I/O should also be as good as your drives allow. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.