At 11/01/2016 12:46 PM, Tobias Holst wrote:
Hi
I can't mount my boot partition anymore. When I try it by entering
"mount /dev/sdi1 /mnt/boot/" I get:
mount: wrong fs type, bad option, bad superblock on /dev/sdi1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
"dmesg | tail" gives me:
BTRFS info (device sdi1): using free space tree
BTRFS info (device sdi1): has skinny extents
BTRFS error (device sdi1): cannot mount read-write because of unsupported optional features (2)
BTRFS: open_ctree failed
I am using an Ubuntu 16.10 Live CD with Kernel 4.8 and btrfs-progs v4.8.2.
"btrfs inspect-internal dump-super /dev/sdi1" gives me the following:
superblock: bytenr=65536, device=/dev/sdi1
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x0f346b08 [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 67ac5740-1ced-4d59-8999-03bb3195ec49
label t-hyper-boot
generation 64
root 20971520
sys_array_size 129
chunk_root_generation 43
root_level 1
chunk_root 12587008
chunk_root_level 0
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 2147483648
bytes_used 102813696
sectorsize 4096
nodesize 4096
leafsize 4096
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x3
compat_ro_flags 0x3 is FREE_SPACE_TREE and FREE_SPACE_TREE_VALID.
FREE_SPACE_TREE_VALID is introduced later to fix a endian bug in free
space tree.
And that seems to be cause.
Thanks,
Qu
incompat_flags 0x34d
( MIXED_BACKREF |
MIXED_GROUPS |
COMPRESS_LZO |
EXTENDED_IREF |
SKINNY_METADATA |
NO_HOLES )
cache_generation 53
uuid_tree_generation 64
dev_item.uuid 273d5800-add1-45bb-8a11-ecd6d8c1503e
dev_item.fsid 67ac5740-1ced-4d59-8999-03bb3195ec49 [match]
dev_item.type 0
dev_item.total_bytes 2147483648
dev_item.bytes_used 667680768
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
Does anyone have an idea why I can't mount it anymore?
Regards,
Tobias
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