我必须断开通过光纤通道连接到 Ubuntu 的 SAN。我该怎么做?
root@fs2:/# umount /srv/media
umount: /srv/media: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))
root@fs2:/# fuser /srv/media
root@fs2:/# fuser /dev/mapper/media
多路径输出:
root@fs2:/# multipath -v2 -l
media (360060160c8101f00d25370be50a6df11) dm-0 DGC ,RAID 5
[size=2.8T][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=0][active]
\_ 3:0:0:0 sda 8:0 [active][undef]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:0 sdb 8:16 [active][undef]
多路径配置:
root@fs2:/# cat /etc/multipath.conf
multipaths {
multipath {
wwid 360060160c8101f00c0f618c25c9edf11
alias web
path_grouping_policy multibus
path_checker directio
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
rr_min_io 100
}
multipath {
wwid 360060160c8101f00d25370be50a6df11
alias media
path_grouping_policy multibus
path_checker directio
path_selector "round-robin 0"
failback manual
rr_weight priorities
no_path_retry 5
rr_min_io 100
}
}
我如何禁用该设备并将其从系统中永久卸载?
答案1
我发现 /etc/exports 中正在使用设备与 nfs 客户端共享。运行exportfs -rv
、从 中删除设备smbd.conf
(重新启动 samba)和从 中删除设备后/etc/fstab
,我能够卸载设备umount /srv/media
。
我也做过:
root@fs2:/# multipath -ll
media (360060160c8101f00d25370be50a6df11) dm-0 DGC ,RAID 5
[size=2.8T][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=1][active]
\_ 3:0:0:0 sda 8:0 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:0 sdb 8:16 [active][ready]
root@fs2:/# multipath -F
root@fs2:/# multipath -ll
最后(其中 sda 和 sdb 取自多路径):
root@fs2:/# echo 1 > /sys/block/sda/device/delete
root@fs2:/# echo 1 > /sys/block/sdb/device/delete
这会在 dmesg 中显示这些消息:
[9847487.812391] sd 3:0:0:0: emc: Detached
[9847491.460307] sd 2:0:0:0: emc: Detached
这似乎最终可以卸载设备。希望有人觉得这有用 :-)