Comment 0 for bug 1701316

We are seeing data corruption issues using the hio driver with kernel 4.10.0

# uname -a
Linux arbok 4.10.0-26-generic #30~16.04.1-Ubuntu SMP Tue Jun 27 09:40:14 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Making xfs fails:

root@arbok:~# mkfs.xfs /dev/hioa
meta-data=/dev/hioa isize=512 agcount=4, agsize=48835584 blks
         = sectsz=512 attr=2, projid32bit=1
         = crc=1 finobt=1, sparse=0
data = bsize=4096 blocks=195342336, imaxpct=25
         = sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=95382, version=2
         = sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
bad magic number
bad magic number
Metadata corruption detected at xfs_sb block 0x0/0x200
libxfs_writebufr: write verifer failed on xfs_sb bno 0x0/0x200

The drive appears to be healthy. Firmware has been upgraded to ver 656:

root@arbok:~# hio_info -d /dev/hioa
hioa Serial number: 022XWV10G2000325
        Size(GB): 800
        Max size(GB): 800
        Hardware version: 1.0
        Firmware version: 656
        Driver version: 2.1.0.28
        Work mode: MLC
        Run time (sec.): 8910490
        Total read(MB): 8499
        Total write(MB): 0
        Lifetime remaining: 99.844%
        Max bad block rate: 0.167%
        Health: OK
        Comment: NA

No relevant entries about read/write errors in dmesg

Also just copying 8G random data and reading those back gives a hash mismatch:
root@arbok:~# dd if=/dev/urandom of=test.dat bs=1G count=8 iflag=fullblock
8+0 records in
8+0 records out
8589934592 bytes (8.6 GB, 8.0 GiB) copied, 85.6076 s, 100 MB/s
root@arbok:~# dd if=test.dat of=/dev/hioa bs=1G count=8 iflag=fullblock
8+0 records in
8+0 records out
8589934592 bytes (8.6 GB, 8.0 GiB) copied, 10.6034 s, 810 MB/s
root@arbok:~# dd if=/dev/hioa of=read-back.dat bs=1G count=8 iflag=fullblock
sha256sum test.dat read-
8+0 records in
8+0 records out
8589934592 bytes (8.6 GB, 8.0 GiB) copied, 66.1872 s, 130 MB/s
root@arbok:~# sha256sum test.dat read-back.dat
6376d245a07c42c990589a3c17c44e63d826d1cb583fc5a065deff9dae69fd3a test.dat
ebfb4ef19ae410f190327b5ebd312711263bc7579970e87d9c1e2d84e06b3c25 read-back.dat