>>>>> "Zdenek" == Zdenek Kabelac <zdenek.kabelac@xxxxxxxxx> writes: Zdenek> Dne 9.12.2015 v 17:40 John Stoffel napsal(a): >> Alasdair> Have you tried '--manglename none' if you aren't using a Alasdair> udev system that mangles names? (Also available via Alasdair> environmnet variable - see man page.) >> >> That seems to be working, using the default Debbian Jessie lvm tools: >> >> dmsetup --manglename none status --target cache >> data-home: 0 1153433600 cache 8 2443/32768 128 54020/819200 80721 >> 350897 64427 66938 0 23882 1 1 writeback 2 migration_threshold 2048 >> smq 0 rw - >> data-local: 0 702545920 cache 8 2443/32768 128 1078/819200 6268 85795 >> 1492 2715 0 1057 0 1 writeback 2 migration_threshold 2048 smq 0 rw - >> >> >> So now I can try to monitor my cache usage. >> >> So the question still remains, what is the long term fix so I don't >> have to deal with this breakage by default? Do I have bad UUIDS on my >> volumes? Zdenek> Yep Zdenek> See supported charset: Zdenek> -- Zdenek> Mangle any character not on a whitelist using mangling_mode when processing Zdenek> device-mapper device names and UUIDs. The names and UUIDs are mangled on Zdenek> input and unmangled on output where the mangling mode is one of: auto Zdenek> (only do the mangling if not mangled yet, do nothing if already mangled, error Zdenek> on mixed), hex (always do the mangling) and none (no mangling). Default mode Zdenek> is auto. Character whitelist: 0-9, A-Z, a-z, #+-.:=@_. This whitelist is also Zdenek> supported by udev. Any character not on a whitelist is replaced with its Zdenek> hex value (two digits) prefixed by \x. Mangling mode could be also set Zdenek> through DM_DEFAULT_NAME_MANGLING_MODE environment variable. Zdenek> --- Zdenek> Udev create symlinks from UUID - so they need to be using udev-supported Zdenek> chars - and you '!' in UUID -> unsupported and needs mangling. I'm happy to fix the UUIDs, the question is HOW. Ideally without having to shutdown the system. As I explained in my earlier email, I tried using 'lvchange -an data/pete' to disable one of my LVs (after unmounting it) but then I can't see it to manage it with dmsetup to fix the UUIDs. John -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
