Hey Guys, I have made a huge mistake with my server configuration and getting now really in trouble. I'm running a WHM/cPanel server on my CentOS, it's a production server with some websites on. My root partitions "/" is running out of space and i need immediately to do something. Resize RAID partitions is a task above my abilities so i start to read everything about it. Unfortunately this is very complected so maybe you guys can help. In this step of my research & learn process i have found out what i need to do, but the how is very complected. My server has two partitions: /dev/md2: 21,0GB /dev/md3: 1979GB Unfortunately md2 is the root partition and to resize it, the server needs to got in the "rescue mode" which means in the end a longer down time. So I decide to shrink md3 and make two new partition for /var and /usr. On this point a few server prints: Code: [B]root@ns506372 [~]# df -h[/B] Filesystem Size Used Avail Use% Mounted on rootfs 20G 17G 1,9G 91% / /dev/root 20G 17G 1,9G 91% / devtmpfs 32G 276K 32G 1% /dev /dev/md3 1,8T 76G 1,7T 5% /home tmpfs 32G 0 32G 0% /dev/shm /dev/root 20G 17G 1,9G 91% /var/tmp /dev/root 20G 17G 1,9G 91% /var/named/chroot/etc/named /dev/root 20G 17G 1,9G 91% /var/named/chroot/etc/named.rfc1912.zones /dev/root 20G 17G 1,9G 91% /var/named/chroot/etc/rndc.key /dev/root 20G 17G 1,9G 91% /var/named/chroot/usr/lib64/bind /dev/root 20G 17G 1,9G 91% /var/named/chroot/etc/named.iscdlv.key /dev/root 20G 17G 1,9G 91% /var/named/chroot/etc/named.root.key ftpback-XXXXXX.net:/export/ftpbackup/XXXXXXXX.net 500G 196G 305G 40% /backup Code: [B]cat /proc/mdstat[/B] Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md2 : active raid1 sdb2[1] sda2[0] 20478912 blocks [2/2] [UU] md3 : active raid1 sdb3[1] sda3[0] 1932506048 blocks [2/2] [UU] Code: [B]root@ns506372 [~]# mdadm --misc --detail /dev/md2[/B] /dev/md2: Version : 0.90 Creation Time : Tue Sep 16 13:52:02 2014 Raid Level : raid1 Array Size : 20478912 (19.53 GiB 20.97 GB) Used Dev Size : 20478912 (19.53 GiB 20.97 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Tue Nov 18 13:58:11 2014 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 94c54da7:d37eee63:a4d2adc2:26fd5302 Events : 0.152 Number Major Minor RaidDevice State 0 8 2 0 active sync /dev/sda2 1 8 18 1 active sync /dev/sdb2 Code: [B]root@ns506372 [~]# mdadm --misc --detail /dev/md3[/B] /dev/md3: Version : 0.90 Creation Time : Tue Sep 16 13:52:03 2014 Raid Level : raid1 Array Size : 1932506048 (1842.98 GiB 1978.89 GB) Used Dev Size : 1932506048 (1842.98 GiB 1978.89 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 3 Persistence : Superblock is persistent Update Time : Tue Nov 18 13:58:19 2014 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 52bfd18b:4f959e4d:a4d2adc2:26fd5302 Events : 0.830 Number Major Minor RaidDevice State 0 8 3 0 active sync /dev/sda3 1 8 19 1 active sync /dev/sdb3 Code: root@ns506372 [~]# [B]parted -l[/B] Modell: ATA HGST HUS724020AL (scsi) Festplatte /dev/sda: 2000GB Sektorgröße (logisch/physisch): 512B/512B Partitionstabelle: gpt Nummer Anfang Ende Größe Dateisystem Name Flags 1 20,5kB 1049kB 1029kB primary bios_grub 2 2097kB 21,0GB 21,0GB ext3 primary raid 3 21,0GB 2000GB 1979GB ext3 primary raid 4 2000GB 2000GB 536MB linux-swap(v1) primary Modell: ATA HGST HUS724020AL (scsi) Festplatte /dev/sdb: 2000GB Sektorgröße (logisch/physisch): 512B/512B Partitionstabelle: gpt Nummer Anfang Ende Größe Dateisystem Name Flags 1 20,5kB 1049kB 1029kB primary bios_grub 2 2097kB 21,0GB 21,0GB ext3 primary raid 3 21,0GB 2000GB 1979GB ext3 primary raid 4 2000GB 2000GB 536MB linux-swap(v1) primary Modell: Unbekannt (unknown) Festplatte /dev/md2: 21,0GB Sektorgröße (logisch/physisch): 512B/512B Partitionstabelle: loop Nummer Anfang Ende Größe Dateisystem Flags 1 0,00B 21,0GB 21,0GB ext3 Modell: Unbekannt (unknown) Festplatte /dev/md3: 1979GB Sektorgröße (logisch/physisch): 512B/512B Partitionstabelle: loop Nummer Anfang Ende Größe Dateisystem Flags 1 0,00B 1979GB 1979GB ext3 It's a GPT (GUID Partition Table) System. I have found this tutorial to Shrink & Grow a Software RAID, but I'm not sure if this gone work for me. http://www.howtoforge.com/how-to-resize-raid-partitions-shrink-and-grow-software-raid By the side the tutorial is from 2008. Falko describes the usage of mdadm and resize2fs, but i don't get the point of how mdadm and resize2fs working together. The other question is, if I'm using "mdadm --grow /dev/md3 --size=XXX" dose it effect on both disks? I'm trying to get this result: md02 = 20GB = mount on / md03 = 1TB = mount on /home md04 = 500GB = mount on /var md05 = 250GB = mount on /usr I'm happy about every advice.
Hi The RAID guide should work. You can also check http://www.howtoforge.com/use_mount...ctory_of_a_ispconfig_server_to_a_new_location
