Could you help me?

i have a problem with file on disperse volume. When i try to read this from 
mount point i recieve error,

# md5sum /mnt/glfs/vmfs/slake-test-bck-m1-d1.qcow2
md5sum: /mnt/glfs/vmfs/slake-test-bck-m1-d1.qcow2: Input/output error

Configuration and status of volume is:

# gluster volume info vol1

Volume Name: vol1
Type: Disperse
Volume ID: a7d52933-fccc-4b07-9c3b-5b92f398aa79
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (13 + 2) = 15
Transport-type: tcp
Brick1: glfs-node11.local:/data1/bricks/brick1
Brick2: glfs-node12.local:/data1/bricks/brick1
Brick3: glfs-node13.local:/data1/bricks/brick1
Brick4: glfs-node14.local:/data1/bricks/brick1
Brick5: glfs-node15.local:/data1/bricks/brick1
Brick6: glfs-node16.local:/data1/bricks/brick1
Brick7: glfs-node17.local:/data1/bricks/brick1
Brick8: glfs-node18.local:/data1/bricks/brick1
Brick9: glfs-node19.local:/data1/bricks/brick1
Brick10: glfs-node20.local:/data1/bricks/brick1
Brick11: glfs-node21.local:/data1/bricks/brick1
Brick12: glfs-node22.local:/data1/bricks/brick1
Brick13: glfs-node23.local:/data1/bricks/brick1
Brick14: glfs-node24.local:/data1/bricks/brick1
Brick15: glfs-node25.local:/data1/bricks/brick1
Options Reconfigured:
transport.address-family: inet
performance.readdir-ahead: on
nfs.disable: on

# gluster volume status vol1
Status of volume: vol1
Gluster process                             TCP Port  RDMA Port  Online  Pid
Brick glfs-node11.local:/data1/bricks/brick
1                                           49152     0          Y       1781
Brick glfs-node12.local:/data1/bricks/brick
1                                           49152     0          Y       3026
Brick glfs-node13.local:/data1/bricks/brick
1                                           49152     0          Y       1991
Brick glfs-node14.local:/data1/bricks/brick
1                                           49152     0          Y       2029
Brick glfs-node15.local:/data1/bricks/brick
1                                           49152     0          Y       1745
Brick glfs-node16.local:/data1/bricks/brick
1                                           49152     0          Y       1841
Brick glfs-node17.local:/data1/bricks/brick
1                                           49152     0          Y       3597
Brick glfs-node18.local:/data1/bricks/brick
1                                           49152     0          Y       2035
Brick glfs-node19.local:/data1/bricks/brick
1                                           49152     0          Y       1785
Brick glfs-node20.local:/data1/bricks/brick
1                                           49152     0          Y       1755
Brick glfs-node21.local:/data1/bricks/brick
1                                           49152     0          Y       1772
Brick glfs-node22.local:/data1/bricks/brick
1                                           49152     0          Y       1757
Brick glfs-node23.local:/data1/bricks/brick
1                                           49152     0          Y       1825
Brick glfs-node24.local:/data1/bricks/brick
1                                           49152     0          Y       1963
Brick glfs-node25.local:/data1/bricks/brick
1                                           49152     0          Y       2376
Self-heal Daemon on localhost               N/A       N/A        Y       2018
Self-heal Daemon on glfs-node15.local       N/A       N/A        Y       38261
Self-heal Daemon on glfs-node16.local       N/A       N/A        Y       36005
Self-heal Daemon on glfs-node12.local       N/A       N/A        Y       25785
Self-heal Daemon on glfs-node27.local       N/A       N/A        Y       13248
Self-heal Daemon on glfs-node19.local       N/A       N/A        Y       38535
Self-heal Daemon on glfs-node18.local       N/A       N/A        Y       21067
Self-heal Daemon on glfs-node21.local       N/A       N/A        Y       5926
Self-heal Daemon on glfs-node22.local       N/A       N/A        Y       12980
Self-heal Daemon on glfs-node23.local       N/A       N/A        Y       8368
Self-heal Daemon on glfs-node26.local       N/A       N/A        Y       8268
Self-heal Daemon on glfs-node25.local       N/A       N/A        Y       7872
Self-heal Daemon on glfs-node17.local       N/A       N/A        Y       15884
Self-heal Daemon on glfs-node11.local       N/A       N/A        Y       36075
Self-heal Daemon on glfs-node24.local       N/A       N/A        Y       37905
Self-heal Daemon on glfs-node30.local       N/A       N/A        Y       31820
Self-heal Daemon on glfs-node14.local       N/A       N/A        Y       3236
Self-heal Daemon on glfs-node13.local       N/A       N/A        Y       25817
Self-heal Daemon on glfs-node29.local       N/A       N/A        Y       21261
Self-heal Daemon on glfs-node28.local       N/A       N/A        Y       32641

Task Status of Volume vol1
There are no active volume tasks

And heal info shows me this:

# gluster volume heal vol1 info
Brick glfs-node11.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node12.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node13.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node14.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node15.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node16.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node17.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node18.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node19.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node20.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node21.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node22.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node23.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node24.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Brick glfs-node25.local:/data1/bricks/brick1
Status: Connected
Number of entries: 1

Other data on volume are accesible.

How to recover only one file (/vmfs/slake-test-bck-m1-d1.qcow2) from this 
volume with this situation ?

Thank you so much!

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