after installing anchieri.9.zip with /S:4

C:\]chkdsk K: /F
he current hard disk drive is: K:
he type of file system for the disk is JFS.
he JFS file system program has been started.
HKDSK  Block size in bytes:  4096
HKDSK  File system size in blocks:  39072080
HKDSK *Phase 0 - Replay Journal Log
HKDSK *Phase 1 - Check Blocks, Files/Directories, and Directory Entries
JFS0187: CHKDSK  Unrecoverable error writing M to K:.  CHKDSK CANNOT CONTINUE.

CHKDSK *Phase 2 - Count Links
CHKDSK *Phase 3 - Rescan for Duplicate Blocks and Verify Directory Tree
CHKDSK *Phase 4 - Report Problems
CHKDSK *Phase 5 - Check Connectivity
CHKDSK *Phase 7 - Rebuild File/Directory Allocation Maps
CHKDSK *Phase 8 - Rebuild Disk Allocation Maps
156288320 kilobytes total disk space.
    56615 kilobytes are in 25551 directories.
131184223 kilobytes are in 346751 user files.
   213804 kilobytes are in extended attributes.
   172456 kilobytes are reserved for system use.
 24774452 kilobytes are available for use.
CHKDSK  File system is clean.
CHKDSK  THE FILE SYSTEM IS NOW AVAILABLE.
CHKDSK  Transferring entries from the LVM Bad Block Table for this file
system to the JFS Bad Block Table for this file system.

CHKDSK  LVM reports 0 bad blocks.  Of these, 0 have been transferred
to the JFS Bad Block List.
    .@.......
[C:\]

the misterious error writing M to K: remain.

theb I submitted the command without the /F 

[C:\]chkdsk K:
The current hard disk drive is: K:
The type of file system for the disk is JFS.
The JFS file system program has been started.
CHKDSK  File system is currently mounted.
JFS0138: CHKDSK  Checking a mounted file system does not produce dependable
results.

CHKDSK  Block size in bytes:  4096
CHKDSK  File system size in blocks:  39072080
CHKDSK *Phase 1 - Check Blocks, Files/Directories, and Directory Entries
CHKDSK *Phase 2 - Count Links
CHKDSK *Phase 3 - Rescan for Duplicate Blocks and Verify Directory Tree
CHKDSK *Phase 4 - Report Problems
CHKDSK *Phase 7 - Verify File/Directory Allocation Maps
CHKDSK *Phase 8 - Verify Disk Allocation Maps
CHKDSK  Incorrect data detected in disk allocation structures.          <-- 
CHKDSK  Incorrect data detected in disk allocation control structures.  <--
156288320 kilobytes total disk space.
    56615 kilobytes are in 25551 directories.
131184223 kilobytes are in 346751 user files.
   213804 kilobytes are in extended attributes.
   172468 kilobytes are reserved for system use.
 24774440 kilobytes are available for use.
JFS0138: CHKDSK  Checking a mounted file system does not produce dependable
results.

CHKDSK  File system is dirty.
CHKDSK  File system is dirty but is marked clean.  In its present state, the
results of accessing K: (except by this utility) are undefined.
    .....@...
[C:\]

<-- for two line with error signaled

and now I have used the switch /S:8 
and rebooted, here is the new result ----> ALL OK <-----

[C:\]chkdsk K: /F
The current hard disk drive is: K:
The type of file system for the disk is JFS.
The JFS file system program has been started.
CHKDSK  Block size in bytes:  4096
CHKDSK  File system size in blocks:  39072080
CHKDSK *Phase 0 - Replay Journal Log
CHKDSK *Phase 1 - Check Blocks, Files/Directories, and Directory Entries
CHKDSK *Phase 2 - Count Links
CHKDSK *Phase 3 - Rescan for Duplicate Blocks and Verify Directory Tree
CHKDSK *Phase 4 - Report Problems
CHKDSK *Phase 5 - Check Connectivity
CHKDSK *Phase 7 - Rebuild File/Directory Allocation Maps
CHKDSK *Phase 8 - Rebuild Disk Allocation Maps
156288320 kilobytes total disk space.
    56615 kilobytes are in 25551 directories.
131184223 kilobytes are in 346751 user files.
   213804 kilobytes are in extended attributes.
   172468 kilobytes are reserved for system use.
 24774440 kilobytes are available for use.
CHKDSK  File system is clean.
CHKDSK  THE FILE SYSTEM IS NOW AVAILABLE.
CHKDSK  Transferring entries from the LVM Bad Block Table for this file
system to the JFS Bad Block Table for this file system.

CHKDSK  LVM reports 0 bad blocks.  Of these, 0 have been transferred
to the JFS Bad Block List.
    ...@.....

Great, I have tested many time and for me with this switch setted at /S:8 
all come OK.