Re: Install questions with RAID
Am 09.08.2011 16:50, schrieb Alex: > Hi, > >> Grub can boot from md device as long as it's a raid 1 device. >> Simply create two partitions on each drive: a 500 MB md autodetect and a XXX >> GB raid autodetect. >> Use the first partition on each drive to create a 500 MB raid 1 device >> containing /boot and use the second partition on each drive to create the >> raid 5 device. >> >> If the first drive dies, at most you will have use grub to rebuild the MBR >> on the new first drive. > Yes, but I also meant to point out that I've since learned that the > upgrade doesn't support it, as I found out when I tried to upgrade a > system from fc14 to fc15 which upgrade-method? i upgraded the following setup from F14 to F15 with YUM where should there be a problem? the upgrade does not know anything about the md-devices Personalities : [raid1] [raid10] md2 : active raid10 sda3[0] sdd3[3] sdc3[2] sdb3[1] 3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [] bitmap: 0/29 pages [0KB], 65536KB chunk md1 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1] 30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [] bitmap: 0/1 pages [0KB], 65536KB chunk md0 : active raid1 sda1[0] sdd1[3] sdc1[2] sdb1[1] 511988 blocks super 1.0 [4/4] [] signature.asc Description: OpenPGP digital signature -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
Re: Install questions with RAID
Hi, > Grub can boot from md device as long as it's a raid 1 device. > Simply create two partitions on each drive: a 500 MB md autodetect and a XXX > GB raid autodetect. > Use the first partition on each drive to create a 500 MB raid 1 device > containing /boot and use the second partition on each drive to create the > raid 5 device. > > If the first drive dies, at most you will have use grub to rebuild the MBR > on the new first drive. Yes, but I also meant to point out that I've since learned that the upgrade doesn't support it, as I found out when I tried to upgrade a system from fc14 to fc15. Thanks for all your help. Thanks, Alex -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
Re: Install questions with RAID
Grub can boot from md device as long as it's a raid 1 device. Simply create two partitions on each drive: a 500 MB md autodetect and a XXX GB raid autodetect. Use the first partition on each drive to create a 500 MB raid 1 device containing /boot and use the second partition on each drive to create the raid 5 device. If the first drive dies, at most you will have use grub to rebuild the MBR on the new first drive. - Gilboa On Aug 9, 2011 5:23 AM, "Craig White" wrote: -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
Re: Install questions with RAID
On Mon, 2011-08-08 at 19:21 -0700, Craig White wrote: > On Mon, 2011-08-08 at 21:49 -0400, Alex wrote: > > Hi, > > I'm trying to install fedora15 and have questions about the disk > > installation procedures. I'm not really interested in using LVM, as I > > don't expect to ever need to grow or resize the disks or partitions. > > I'd like to create a RAID5 array from the four disks in the server. > > > > I understand RAID isn't supported on the boot device. Am I forced to > > install the boot loader on only one disk? What if that one disk > > becomes inaccessible? > > > > If I have one partition on one disk that isn't part of a RAID volume, > > it's really going to make partitioning and general disk setup much > > more difficult, because all other partitions on all other disks will > > be part of a RAID5 volume. > > I guess grub still can't boot from an md filesystem. Make a 500M > partition on each of the 4 drives as the first thing you do. Put /boot > on /dev/sda and leave the others blank/unused. Make the rest of your > partitions into your RAID 5 and your set. After everything is installed > and working, > > (as root) > mkdir /boot2 > mount /dev/sdb1 /boot > rsync -rvup /boot/* /boot2 > umount /boot2 > > mount /dev/sdc1 /boot > rsync -rvup /boot/* /boot2 > umount /boot2 > > mount /dev/sdd1 /boot > rsync -rvup /boot/* /boot2 > umount /boot2 typed too fast and now proofed... corrections mkdir /boot2 mount /dev/sdb1 /boot2 rsync -rvup --delete-after /boot/* /boot2 umount /boot2 mount /dev/sdc1 /boot2 rsync -rvup --delete-after /boot/* /boot2 umount /boot2 mount /dev/sdd1 /boot2 rsync -rvup --delete-after /boot/* /boot2 umount /boot2 do this once in a while - probably after new kernels are installed and you are set for a disaster Craig -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
Re: Install questions with RAID
On Mon, 2011-08-08 at 21:49 -0400, Alex wrote: > Hi, > I'm trying to install fedora15 and have questions about the disk > installation procedures. I'm not really interested in using LVM, as I > don't expect to ever need to grow or resize the disks or partitions. > I'd like to create a RAID5 array from the four disks in the server. > > I understand RAID isn't supported on the boot device. Am I forced to > install the boot loader on only one disk? What if that one disk > becomes inaccessible? > > If I have one partition on one disk that isn't part of a RAID volume, > it's really going to make partitioning and general disk setup much > more difficult, because all other partitions on all other disks will > be part of a RAID5 volume. I guess grub still can't boot from an md filesystem. Make a 500M partition on each of the 4 drives as the first thing you do. Put /boot on /dev/sda and leave the others blank/unused. Make the rest of your partitions into your RAID 5 and your set. After everything is installed and working, (as root) mkdir /boot2 mount /dev/sdb1 /boot rsync -rvup /boot/* /boot2 umount /boot2 mount /dev/sdc1 /boot rsync -rvup /boot/* /boot2 umount /boot2 mount /dev/sdd1 /boot rsync -rvup /boot/* /boot2 umount /boot2 This way, if /dev/sda takes a dump, you'll have to boot a rescue disk, chroot to /mnt/sysimage and 'grub-install /dev/sda' (because when you remove /dev/sda, another will take it's place). But that's not very difficult. Suggest that you do RAID 0 + 1 or RAID 6 (if that's possible in Anaconda). Big hard drives are cheap these days, RAID 0 + 1 gives you speed and reliability. If speed and reliability are not your thing, then RAID 6 is a much better choice than RAID 5. Craig -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
