Xenserver之Xenserver 7 fatsb文件丢失恢复方法

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摘要

只是我之前遇到的一个问题，今天为了演示再次把问题还原下，来看看怎么实现恢复。

[[email protected] ~]# cat /etc/fstab 
UUID=6f29f0ba-a0ea-4799-bdf4-51570d8354c6  /iso_storage  ext4  defaults    0 0
[[email protected] ~]# df -hP
Filesystem                                                         Size  Used Avail Use% Mounted on
/dev/sda1                                                           18G  1.8G   16G  11% /
devtmpfs                                                           2.0G  8.0K  2.0G   1% /dev
tmpfs                                                              2.0G  592K  2.0G   1% /dev/shm
tmpfs                                                              2.0G  2.1M  2.0G   1% /run
tmpfs                                                              2.0G     0  2.0G   0% /sys/fs/cgroup
xenstore                                                           2.0G     0  2.0G   0% /var/lib/xenstored
/dev/loop0                                                          55M   55M     0 100% /var/xen/xc-install
/dev/sda5                                                          4.0G  260M  3.5G   7% /var/log
tmpfs                                                              394M     0  394M   0% /run/user/0
/dev/VG_XenStorage-e383cf7d-45b2-7afb-b4e0-43e4a190f55a/local_iso   20G   45M   19G   1% /iso_storage
[[email protected] ~]#

先来查查sda盘的分区信息，使用blkid命令我们可以看到分区的文件系统 LABEL UUID等信息，这就足够我们恢复了

[[email protected] ~]# blkid /dev/sda*
/dev/sda: PTTYPE="gpt" 
/dev/sda1: LABEL="root-qubemj" UUID="c8170070-eb33-4e3b-a816-a52e90b60a3f" TYPE="ext3" PARTUUID="cfa2d968-58a9-4358-9884-8252f6ff6155" 
/dev/sda2: PARTUUID="058b5bdd-076e-42dd-afbb-9de41b1ae0c5" 
/dev/sda3: UUID="iTen8p-0CVA-YoF5-Jyqd-aQMq-Yeis-7v3vnB" TYPE="LVM2_member" PARTUUID="cce85972-1476-494f-8630-eee61aef0592" 
/dev/sda4: PARTUUID="2b35a223-a191-41cf-a7fd-81b5750dd507" 
/dev/sda5: LABEL="logs-qubemj" UUID="c270b219-06b7-4632-b902-ae37f8a2b887" TYPE="ext3" PARTUUID="ac1b8359-69b4-4d88-a2d2-1e58fd0b60ea" 
/dev/sda6: LABEL="swap-qubemj" UUID="fdd4f987-8786-4960-a171-095fa3033405" TYPE="swap" PARTUUID="c71e4c15-45f9-48ce-89b1-ad16d89516e3" 
[[email protected] ~]#

再来看看恢复好之后的文件内容,唉，看来Xenserver的默认自动分区方案还是非常好用的啊。

[[email protected] ~]# cat /etc/fstab
#/dev/sda1: LABEL="root-qubemj" UUID="c8170070-eb33-4e3b-a816-a52e90b60a3f" TYPE="ext3" PARTUUID="cfa2d968-58a9-4358-9884-8252f6ff6155" 
#/dev/sda2: PARTUUID="058b5bdd-076e-42dd-afbb-9de41b1ae0c5" 
#/dev/sda3: UUID="iTen8p-0CVA-YoF5-Jyqd-aQMq-Yeis-7v3vnB" TYPE="LVM2_member" PARTUUID="cce85972-1476-494f-8630-eee61aef0592" 
#/dev/sda4: PARTUUID="2b35a223-a191-41cf-a7fd-81b5750dd507" 
#/dev/sda5: LABEL="logs-qubemj" UUID="c270b219-06b7-4632-b902-ae37f8a2b887" TYPE="ext3" PARTUUID="ac1b8359-69b4-4d88-a2d2-1e58fd0b60ea" 
#/dev/sda6: LABEL="swap-qubemj" UUID="fdd4f987-8786-4960-a171-095fa3033405" TYPE="swap" PARTUUID="c71e4c15-45f9-48ce-89b1-ad16d89516e3"


#######上面是本机各个分区的详细信息

LABEL=root-qubemj    /         ext3     defaults   1  1
#LABEL=BOOT-QUBEMJ    /boot/efi         vfat     defaults   0  2 #如果有EFI启动的还需要加这一条
LABEL=swap-qubemj          swap      swap   defaults   0  0
LABEL=logs-qubemj    /var/log         ext3     defaults   0  2
/opt/xensource/packages/iso/XenCenter.iso   /var/xen/xc-install   iso9660   loop,ro   0  0


UUID=6f29f0ba-a0ea-4799-bdf4-51570d8354c6  /iso_storage  ext4  defaults    0 0
[[email protected] ~]#