I solved the problem deleting, with Qxlwinreader, config file in the unreadable 
file and copying an old config from a backup qxl.win. Now it’s all’ OK.
Thank you very much for your advice. Have a nice night.

Inviato da iPad

> Il giorno 3 gen 2019, alle ore 00:43, Dilwyn Jones via Ql-Users 
> <ql-users@lists.q-v-d.com> ha scritto:
> hdutils DRVCHK and DRVLINK are QL side - they are QL executables. I have no
> instructions for them, just this extract from the SMSQ/E manual.
> Dilwyn
> --------------------------------------------------
> DRVCHK and DRVLINK  Hard Disk Utilities
> DRVCHK and DRVLINK are two hard disk utilities. In an ideal world you should
> need neither, and if all is well there should be no harm done if you try
> them. The programs will work on “QLWA” type hard disks, i.e. on the Miracle
> Harddisk, all ACSI and SCSI harddisks connected to ATARIs, the QXL and QL
> formatted disks on the Q60. They will also work with QXL.WIN type hard disk
> containers, as used on QPC, SMSQmulator, Q68 and newer versions of SMSQ/E
> for the Q60. We have no experience with the Falkenberg Harddisk interface
> (it might trash your harddisk, we don't know), but it will not work on the
> DRVCHK is rather like a soft format which checks the readability of the free
> sectors on the drive. It does not check the sectors which have been
> allocated to files. If you find that reading some files is becoming
> unreliable, you should copy the contents to a new file and then delete the
> old file. This returns the sectors to the free space list. Executing DRVCHK
> will check all the free sectors and eliminate unreadable sectors. Unreliable
> sectors may not get eliminated and it might be useful to execute DRVCHK more
> than once. If you have a rather unreliable drive, you may find it worthwhile
> executing DRVCHK after a hard disk format as an additional check.
> DRVLINK is intended to repair the hard disk map of contents when this has
> been corrupted. (Note that as the hard disk map is in the form of linked
> lists similar to those used by MSDOS and other low grade operating systems,
> continuing to create, delete or modify files on the disk when you suspect
> that it may be corrupted is very unwise. It is safe to copy files to new
> backup disks, but DO NOT OVERWRITE old backup disks, or you may find that
> your backups are corrupted as well!). The hard disk map can be corrupted by
> a variety of software: the main culprits are probably the GST Linker (old
> version, not the one supplied by Quanta) and any software which draws arcs
> or uses ATAN, ASIN or ACOS (QDOS only, not SMSQ/E!).
> The most obvious symptoms of corrupted maps are "drive full" messages when
> the drive is not full or "bad or changed medium" when accessing files. In
> the latter case, execute DRVLINK first, then delete the bad files, and
> finally execute DRVCHK to check the freed sectors.
> DRVLINK may not completely repair the hard disk map, but it should put it
> into a state where it will not get any worse. BEWARE: although DRVLINK is
> believed to be safe, there could possibly be circumstances where the cure
> could be worse than the disease. Corrupted maps are quite rare, so there has
> not been much opportunity to exercise DRVLINK.
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