On 6/13/13 2:45 PM, Autif Khan wrote: > On Thu, Jun 13, 2013 at 2:55 PM, Autif Khan <autif.mlist@xxxxxxxxx> wrote: >> Hi, >> >> We are using /dev/disk/by-label/OURLABEL to mount USB disk partitions. >> >> We were using Ubuntu 12.04 with 1.42 version of e2fsprogs - where we >> encountered SSD corruption issues on unclean powerdown. It was >> suggested that we upgrade to the latest e2fsprogs >> (http://marc.info/?l=linux-ext4&m=137035378614543&w=2). >> >> After the upgrade to 1.42.7, we do not have /dev/disk/by-label >> >> I am not sure if this is the right place to ask this - but I thought >> that I should start here and ask in udev mailing list later - (that >> whole thing about correlation mumble causation). >> >> I am still researching how /dev/disk/by-label comes into existence - >> please advice if there is something obvious that I am missing. >> > > Thanks djwong#ext4 for all the help on IRC > > It seems like blkid -o udev /dev/sdb1 displays info about the volume - > which is used by udev rules to populates /dev/disk/by-label > > The output when e2fsprogs version 1.42 was used: > > ubuntu@mac0013950af6fb:/lib/udev/rules.d$ sudo blkid -o udev -p /dev/sdb1 ubuntu isn't using blkid from util-linux? That's really where it's maintained these days, a little surprised that blkid's still in use from e2fsprogs, though I don't know my ubuntu releases. Maybe this is Crufty Crow? ;) Fedora has been building w/ --disable-libblkid for quite a while, just FWIW. -Eric > ID_FS_LABEL=KOKO > ID_FS_LABEL_ENC=KOKO > ID_FS_UUID=56D8-F5EE > ID_FS_UUID_ENC=56D8-F5EE > ID_FS_VERSION=FAT32 > ID_FS_TYPE=vfat > ID_FS_USAGE=filesystem > ID_PART_ENTRY_SCHEME=dos > ID_PART_ENTRY_TYPE=0xb > ID_PART_ENTRY_FLAGS=0x80 > ID_PART_ENTRY_NUMBER=1 > ID_PART_ENTRY_OFFSET=32 > ID_PART_ENTRY_SIZE=251616 > ID_PART_ENTRY_DISK=8:16 > > > The output when e2fsprogs version 1.42.7 was used: > ubuntu@mac001395089897:~$ sudo blkid -o udev /dev/sda1 > Invalid output format udev. Choose from value, > device, list, or full > > BTW, sudo blkid -o full /dev/sdb1 worked just fine - had the LABEL and > everything. > > Also - looks like 1.42.7 does not support the -p option. From the man page: > > -p Switch to low-level superblock probing mode (bypass cache). > > Is there a configuration option that will allow blkid to display udev > output formats? I could not find with ./configure --help > > Thanks > > Autif > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
