ls file exist, but can't access.

[lina <lina.lastname@gmail.com>]

$ ls -lrt
total 8
-rw-r--r-- 1 lina lina  367 Sep 27 00:15  RET
drwx------ 2 lina lina 4096 Sep 27 00:16 auto-save-list

$ ls -lrt RET
ls: cannot access RET: No such file or directory

$ cat RET
cat: RET: No such file or directory

$ rm RET
rm: cannot remove `RET': No such file or directory

:~/.emacs.d$ ls
auto-save-list   RET


Is it weird? or this file stored in some weird place.

There is another thing, which is isolated from this one,

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              95G   54G   37G  60% /
/dev/sda3             1.2T  681G  482G  59% /data
tmpfs                  12G 1012K   12G   1% /dev/shm
apricot2-local:/vol/ds_vol
                      4.6T  1.9T  2.8T  40% /home
/dev/gpfs1            5.5T  919G  4.6T  17% /gpfs_data

 /dev/gpfs1  is twice faster than /home/lina checked via dd in read and
write speed, but `ls` so slow.

I don't know how to check, indeed I have thousands of files generated
there. so I could obviously feel the time retard.

Thanks for your time,

Best regards,