linux:linux_move_bootdisk_tmp
Table of Contents
Linux replace boot disk
Move boot disk on PPC64LE linux partition
[root@lnxtest-101 ~]# cat /etc/redhat-release Red Hat Enterprise Linux release 8.7 (Ootpa) [root@lnxtest-101 ~]# uname -a Linux lnxtest-101.police.etat.lu 4.18.0-425.3.1.el8.ppc64le #1 SMP Fri Sep 30 11:30:21 EDT 2022 ppc64le ppc64le ppc64le GNU/Linux
Step 1: make a disk snapshot on SVC
In the following procedure, be attentive to the disk name, some commands are disruptive
Step 2: add a new disk
The disk can be multipath or not
[root@lnxtest-101 ~]# multipath -ll mpathd (360050768018186646800000000000e75) dm-1 IBM,2145 size=40G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw |-+- policy='service-time 0' prio=50 status=active | |- 3:0:1:0 sdi 8:128 active ready running | |- 4:0:1:0 sdm 8:192 active ready running | |- 1:0:5:0 sdt 65:48 active ready running | `- 2:0:5:0 sds 65:32 active ready running `-+- policy='service-time 0' prio=10 status=enabled |- 3:0:3:0 sdk 8:160 active ready running |- 4:0:3:0 sdo 8:224 active ready running |- 2:0:7:0 sdv 65:80 active ready running `- 1:0:7:0 sdx 65:112 active ready running mpathf (SIBM_3303_NVDISKfb563ae0cd77a45523162dc37ff302e1) dm-12 IBM,3303 NVDISK size=40G features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 5:0:1:0 sdg 8:96 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 6:0:1:0 sdh 8:112 active ready running [root@lnxtest-101 ~]# vgs VG #PV #LV #SN Attr VSize VFree rootvg 1 7 0 wz--n- 39.00g 25.00g [root@lnxtest-101 ~]# pvs PV VG Fmt Attr PSize PFree /dev/mapper/mpathd3 rootvg lvm2 a-- 39.00g 25.00g [root@lnxtest-101 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/mpathd2 999M 586M 414M 59% /boot /dev/mapper/rootvg-usr 3.0G 2.5G 587M 81% /usr /dev/mapper/rootvg-tmp 1014M 40M 975M 4% /tmp /dev/mapper/rootvg-var 3.0G 935M 2.1G 31% /var /dev/mapper/rootvg-home 1014M 40M 975M 4% /home [root@lnxtest-101 ~]# fdisk -l /dev/mapper/mpathd Disk /dev/mapper/mpathd: 40 GiB, 42949672960 bytes, 83886080 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 32768 bytes / 32768 bytes Disklabel type: dos Disk identifier: 0xdd417826 Device Boot Start End Sectors Size Id Type /dev/mapper/mpathd1 * 2048 22527 20480 10M 41 PPC PReP Boot /dev/mapper/mpathd2 22528 2080767 2058240 1005M 83 Linux /dev/mapper/mpathd3 2080768 83886079 81805312 39G 8e Linux LVM
Step 3: clone partition table on new disk
Yum cleanup before starting
[root@lnxtest-101 ~]# yum clean all
[root@lnxtest-101 ~]# multipath -ll | grep mpath mpathd (360050768018186646800000000000e75) dm-1 IBM,2145 mpathf (SIBM_3303_NVDISKfb563ae0cd77a45523162dc37ff302e1) dm-12 IBM,3303 NVDISK
Clone partition table
[root@lnxtest-101 ~]# sfdisk -d /dev/mapper/mpathd | sfdisk --force /dev/mapper/mpathf Checking that no-one is using this disk right now ... FAILED This disk is currently in use - repartitioning is probably a bad idea. Umount all file systems, and swapoff all swap partitions on this disk. Use the --no-reread flag to suppress this check. Disk /dev/mapper/mpathf: 40 GiB, 42949672960 bytes, 83886080 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes >>> Script header accepted. >>> Script header accepted. >>> Script header accepted. >>> Script header accepted. >>> Created a new DOS disklabel with disk identifier 0xdd417826. /dev/mapper/mpathf-part1: Created a new partition 1 of type 'PPC PReP Boot' and of size 10 MiB. /dev/mapper/mpathf-part2: Created a new partition 2 of type 'Linux' and of size 1005 MiB. /dev/mapper/mpathf-part3: Created a new partition 3 of type 'Linux LVM' and of size 39 GiB. /dev/mapper/mpathf-part4: Done. New situation: Disklabel type: dos Disk identifier: 0xdd417826 Device Boot Start End Sectors Size Id Type /dev/mapper/mpathf-part1 * 2048 22527 20480 10M 41 PPC PReP Boot /dev/mapper/mpathf-part2 22528 2080767 2058240 1005M 83 Linux /dev/mapper/mpathf-part3 2080768 83886079 81805312 39G 8e Linux LVM The partition table has been altered. Calling ioctl() to re-read partition table. Re-reading the partition table failed.: Invalid argument The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8). Syncing disks.
Rescan partitions
[root@lnxtest-101 ~]# partprobe -s
[root@lnxtest-101 ~]# pvcreate /dev/mapper/mpathf3 Physical volume "/dev/mapper/mpathf3" successfully created. [root@lnxtest-101 ~]# vgs VG #PV #LV #SN Attr VSize VFree rootvg 1 7 0 wz--n- 39.00g 25.00g
Step 4: move LVM to new disk
Extend your rootvg
[root@lnxtest-101 ~]# vgextend rootvg /dev/mapper/mpathf3
Move data from one disk to another
[root@lnxtest-101 ~]# pvmove -b /dev/mapper/mpathd3 /dev/mapper/mpathf3 [root@lnxtest-101 ~]# lvs -a -o+devices LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices besclientlv rootvg -wI-ao---- 1.00g pvmove0(0) home rootvg -wI-ao---- 1.00g pvmove0(0) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(0),/dev/mapper/mpathf3(0) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(512),/dev/mapper/mpathf3(512) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(768),/dev/mapper/mpathf3(768) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(1024),/dev/mapper/mpathf3(1024) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(1792),/dev/mapper/mpathf3(1792) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(2560),/dev/mapper/mpathf3(2560) [pvmove0] rootvg p-C-aom--- 14.00g /dev/mapper/mpathd3 14.29 /dev/mapper/mpathd3(3328),/dev/mapper/mpathf3(3328) root rootvg -wI-ao---- 3.00g pvmove0(0) swap rootvg -wI-ao---- 2.00g pvmove0(0) tmp rootvg -wI-ao---- 1.00g pvmove0(0) usr rootvg -wI-ao---- 3.00g pvmove0(0) var rootvg -wI-ao---- 3.00g pvmove0(0)
Check the end of the move process
[root@lnxtest-101 ~]# vgreduce rootvg /dev/mapper/mpathd3 Removed "/dev/mapper/mpathd3" from volume group "rootvg" [root@lnxtest-101 ~]# pvremove /dev/mapper/mpathd3
LVM cleanup
[root@lnxtest-101 ~]# vgreduce rootvg /dev/mapper/mpathd3 Removed "/dev/mapper/mpathd3" from volume group "rootvg" [root@lnxtest-101 ~]# pvremove /dev/mapper/mpathd3
Step 5: Copy boot sectors
Clone PPC PReP Boot partition:
[root@lnxtest-101 ~]# dd if=/dev/mapper/mpathd1 of=/dev/mapper/mpathf1 bs=512 conv=noerror,sync 20480+0 records in 20480+0 records out 10485760 bytes (10 MB, 10 MiB) copied, 0.58557 s, 17.9 MB/s
Clone /boot:
[root@lnxtest-101 ~]# umount /boot [root@lnxtest-101 ~]# multipath -ll | grep mpath mpathd (360050768018186646800000000000e75) dm-1 IBM,2145 mpathf (SIBM_3303_NVDISKfb563ae0cd77a45523162dc37ff302e1) dm-12 IBM,3303 NVDISK [root@lnxtest-101 ~]# dd if=/dev/mapper/mpathd2 of=/dev/mapper/mpathf2 bs=512 conv=noerror,sync 2058240+0 records in 2058240+0 records out 1053818880 bytes (1.1 GB, 1005 MiB) copied, 65.658 s, 16.1 MB/s [root@lnxtest-101 ~]# mount /boot
Copy boot sector:
[root@lnxtest-101 ~]# dd if=/dev/mapper/mpathd of=/dev/mapper/mpathf bs=1 count=512 512+0 records in 512+0 records out 512 bytes copied, 0.00110371 s, 464 kB/s
Step 6: Install GRUB in new disk
First test on the disk…failed, then on PreP partition:
[root@lnxtest-101 ~]# grub2-install /dev/mapper/mpathf Installing for powerpc-ieee1275 platform. grub2-install: error: the chosen partition is not a PReP partition. [root@lnxtest-101 ~]# grub2-install /dev/mapper/mpathf1 Installing for powerpc-ieee1275 platform. Installation finished. No error reported.
Check grub config, here virtual FC in the config
[root@lnxtest-101 ~]# cat /boot/grub2/grub.cfg search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//vdevice/vfc-client@30000006/disk@5005076810078be4,msdos2' 7895f8b3-3eda-4ff3-903f-58d08a3447d4 search --no-floppy --fs-uuid --set=root 7895f8b3-3eda-4ff3-903f-58d08a3447d4 search --no-floppy --fs-uuid --set=boot --hint-ieee1275='ieee1275//vdevice/vfc-client@30000006/disk@5005076810078be4,msdos2' 7895f8b3-3eda-4ff3-903f-58d08a3447d4 search --no-floppy --fs-uuid --set=boot 7895f8b3-3eda-4ff3-903f-58d08a3447d4
Rebuild grb config and boot sector
[root@lnxtest-101 ~]# dracut --regenerate-all --force [root@lnxtest-101 ~]# grub2-mkconfig -o /boot/grub2/grub.cfg Generating grub configuration file ... Generating boot entries from BLS files... done
Check grub config, now virtual SCSI in the config
[root@lnxtest-101 ~]# cat /boot/grub2/grub.cfg | grep flopp search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//vdevice/v-scsi@30000007/disk@8100000000000000,msdos2' 7895f8b3-3eda-4ff3-903f-58d08a3447d4 search --no-floppy --fs-uuid --set=root 7895f8b3-3eda-4ff3-903f-58d08a3447d4 search --no-floppy --fs-uuid --set=boot --hint-ieee1275='ieee1275//vdevice/v-scsi@30000007/disk@8100000000000000,msdos2' 7895f8b3-3eda-4ff3-903f-58d08a3447d4 search --no-floppy --fs-uuid --set=boot 7895f8b3-3eda-4ff3-903f-58d08a3447d4
Check grub config, now virtual SCSI in the config
[root@lnxtest-101 ~]# multipath -ll ... mpathf (SIBM_3303_NVDISKfb563ae0cd77a45523162dc37ff302e1) dm-12 IBM,3303 NVDISK size=40G features='1 queue_if_no_path' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 5:0:1:0 sdg 8:96 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 6:0:1:0 sdh 8:112 active ready running
Set the bootlist and reboot
[root@lnxtest-101 ~]# bootlist -m normal sdg sdh [root@lnxtest-101 ~]# init 6
linux/linux_move_bootdisk_tmp.txt · Last modified: 2024/09/20 11:30 by manu
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