Package: lvm2
Version: 2.02.95-4
Severity: normal
Using --type mirror LV mirroring, I could get information about which
physical disks that a given LV was on, by
$ lvdisplay -m vgname/lvname
which would at least tell me the [hidden internal] LV names that the
mirror was distributed among; I could then
$ lvdisplay -am vgname/lvname_mimage_{0,1}
to find them.
It seems that --type raid1 happens to use _rimage_$N as its image names,
but I only found that out by hunting around directly using
$ dmsetup info | grep lvname
It would be good if similar information was displayed.
-----
That said, ideally it would be nice if such "cascaded" LVs would display
their component information, perhaps in a tree looking like this:
$ lvdisplay -avm vg_cel/root64
Using logical volume(s) on command line
--- Logical volume ---
LV Path /dev/vg_cel/root64
LV Name root64
VG Name vg_cel
LV UUID jcstwu-6f81-QcE8-dIl3-eSzo-VeQX-RRjU8D
LV Write Access read/write
LV Creation host, time ,
LV Status available
# open 1
LV Size 1.86 GiB
Current LE 476
Mirrored volumes 2
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:2
--- Segments ---
Logical extent 0 to 475:
Type raid1
--- Logical volume ---
Internal LV Name root64_rimage_0
--- Segments ---
Logical extent 0 to 475:
Typelinear
Physical volume /dev/sdb2
Physical extents 36224 to 36699
--- Logical volume ---
Internal LV Name root64_rimage_1
--- Segments ---
Logical extent 0 to 475:
Typelinear
Physical volume /dev/sdd2
Physical extents 35841 to 36316
-- System Information:
Debian Release: wheezy/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages lvm2 depends on:
ii dmsetup 2:1.02.74-4
ii initscripts 2.88dsf-34
ii libc6 2.13-37
ii libdevmapper-event1.02.1 2:1.02.74-4
ii libdevmapper1.02.1 2:1.02.74-4
ii libreadline5 5.2-12
ii libudev0 175-7
ii lsb-base 4.1+Debian8
lvm2 recommends no packages.
lvm2 suggests no packages.
-- no debconf information
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