Hi,
I'm unable to mount btrfs on ppc64 hosts and other hosts with 64k
pagesize(like aarch64, ppc64le). It seems that it's commit 99e3ecfcb9f4
("Btrfs: add more validation checks for superblock") introduced this
failure, btrfs fails stripesize check.
[root@ibm-p8-kvm-09-guest-06 btrfs-progs]# uname -r
4.7.0-rc3
[root@ibm-p8-kvm-09-guest-06 btrfs-progs]# ./mkfs.btrfs -f /dev/vda3
btrfs-progs v4.4
See http://btrfs.wiki.kernel.org for more information.
Label: (null)
UUID: 06813ff6-d585-4c54-b4df-b7d6920d27ba
Node size: 65536
Sector size: 65536
Filesystem size: 15.00GiB
Block group profiles:
Data: single 8.00MiB
Metadata: DUP 1.01GiB
System: DUP 12.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata
Number of devices: 1
Devices:
ID SIZE PATH
1 15.00GiB /dev/vda3
[root@ibm-p8-kvm-09-guest-06 btrfs-progs]# mount /dev/vda3 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/vda3,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@ibm-p8-kvm-09-guest-06 btrfs-progs]# dmesg | tail
...
[ 1910.048650] BTRFS: device fsid 06813ff6-d585-4c54-b4df-b7d6920d27ba devid 1
transid 3 /dev/vda3
[ 1913.152085] BTRFS error (device vda3): invalid stripesize 4096
[ 1913.154349] BTRFS error (device vda3): superblock contains fatal errors
[ 1913.200300] BTRFS: open_ctree failed
Thanks,
Eryu
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