this is a test with your anchieri.4 zip file [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 File system object FF370631 is linked as: <-- please view \I_\MMEDIA\FOTO\2011\BATTESIMO-MATTIA-NOSELLA\P9040083.JPG <-- this line CHKDSK Format error in Extended Attributes Space or descriptor. <-- 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. 56616 kilobytes are in 25552 directories. 153273571 kilobytes are in 346767 user files. 213808 kilobytes are in extended attributes. 172461 kilobytes are reserved for system use. 2685096 kilobytes are available for use. JFS0138: CHKDSK Checking a mounted file system does not produce dependable results. CHKDSK ERRORS HAVE BEEN DETECTED. Start CHKDSK with the /F parameter to repair. 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:\] Here chkdsk with /F [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 JFS0187: CHKDSK Unrecoverable error writing M to K:. CHKDSK CANNOT CONTINUE. <-- but it continue ......@.. JFS0187: CHKDSK Unrecoverable error writing M to K:. CHKDSK CANNOT CONTINUE. <-- and finally end .....@... [C:\] BUT IF I REINSTALL THE ORIGINAL VERSION 10162 this don't occur and the program come to end with disk available and mounted. I have renamed my disk as 'P:' as preceding hint using LVM and then I have rechecked the disk: [P:\]CHKDSK p: /f The current hard disk drive is: P: 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 JFS0148: CHKDSK Unrecoverable error reading M from p:. CHKDSK CANNOT CONTINUE. ..@...... [P:\] After renaming the disk from 'P:' to 'K:' I copied all file from IBM version 10162 and rebooted then run command: chkdsk K: /F the first three or four line is gone but reminder are here : 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. 56616 kilobytes are in 25552 directories. 153273571 kilobytes are in 346767 user files. 213808 kilobytes are in extended attributes. 172461 kilobytes are reserved for system use. 2685096 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:\] This version give no error. After that I have reinstalled your USBHCD190.ZIP + ANCHIERI.4 FILE REBOOTED AND RUN CHKDSK ON drive K: your version is always in error. [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 JFS0148: CHKDSK Unrecoverable error reading M from K:. CHKDSK CANNOT CONTINUE. @........ [C:\] As you can see the result is variable in many case give different result. I don't say how help you in doing other test, give me a hint.