无法挂载多路径 LUN

无法挂载多路径 LUN

我正在尝试挂载一个 lun,它在 multipath -ll 中可见,并且我可以使用 lsblk 看到对它的多重访问。我知道在某处搞砸了,因为 sda 不再明显安装在 lsblk 中,而且我找不到位置。先感谢您。

    root@debian:~# multipath -ll
mpathb (3600508b1001037383941424344450500) dm-0 HP,LOGICAL VOLUME
size=68G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=1 status=active
  `- 3:0:0:0 sda 8:0  active ready running
mpatha (3600601601ad126004652c478fd40e511) dm-1 DGC,VRAID
size=500G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
|-+- policy='service-time 0' prio=4 status=active
| |- 2:0:0:0 sdb 8:16 active ready running
| `- 4:0:1:0 sde 8:64 active ready running
`-+- policy='service-time 0' prio=1 status=enabled
  |- 2:0:1:0 sdc 8:32 active ready running
  `- 4:0:0:0 sdd 8:48 active ready running
root@debian:~# lsblk
NAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda      8:0    0 68.3G  0 disk
├─sda1   8:1    0 1007K  0 part
├─sda2   8:2    0  127M  0 part
└─sda3   8:3    0 68.2G  0 part
sdb      8:16   0  500G  0 disk
├─sdb1   8:17   0  244G  0 part
└─sdb2   8:18   0  256G  0 part
sdc      8:32   0  500G  0 disk
├─sdc1   8:33   0  244G  0 part
└─sdc2   8:34   0  256G  0 part
sdd      8:48   0  500G  0 disk
├─sdd1   8:49   0  244G  0 part
└─sdd2   8:50   0  256G  0 part
sde      8:64   0  500G  0 disk
├─sde1   8:65   0  244G  0 part
└─sde2   8:66   0  256G  0 part
sr0     11:0    1 1024M  0 rom

答案1

您无法 mount /dev/sdb,因为它是多路径映射的一部分,因此被视为“繁忙”。您可以使用/dev/mapper/mpatha它,但您可能不希望这样做,因为底层设备是分区的。因此,首先创建分区设备(除非它们已经存在)并安装它们:

# kpartx -avp-part /dev/mapper/mpatha
# mount /dev/mapper/mpatha-part1 /disk

答案2

lsblk正在使用/proc/$$/mountinfo.

strace lsblk 2>&1 | grep /proc
open("/proc/self/mountinfo", O_RDONLY|O_CLOEXEC) = 7
lstat("/proc", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
lstat("/proc/self", {st_mode=S_IFLNK|0777, st_size=0, ...}) = 0
readlink("/proc/self", "755", 4095)     = 3
lstat("/proc/755", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
lstat("/proc/755/mountinfo", {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
open("/proc/swaps", O_RDONLY|O_CLOEXEC) = 9

也许/proc没有安装(ls /proc检查)。

编辑

as /procis Mounted grep /dev/sd /proc/$$/mountinfo来检查挂载了什么 sd 设备。

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