Re: Fragmented Storage - V7R4

Hello Steve,

Am 07.12.2025 um 01:51 schrieb Steve Meehan <stevemeehan@xxxxxxxxx>:

Hello. I work on some systems where the fragmented storage (command
QMGTOOLS/CHKDSKFRG) goes over 20% after 6 months. Is this normal?

I'm 100% sure this is very dependent on how the system is used and maintained. So, "normal" isn't really applicable in this context.

If not, does anyone have any suggestions as to what can be checked and how to check
it?

What is your desired goal?

The spreading of data over many "disk arms" greatly lessens the overall impact of fragmentation for random reads. If you need to sequentially read large amounts of data repeatedly, it could be beneficial to run strdskrgz, though.

If you're using modern SSD- or even NVMe based secondary storage, both having a latency of virtually zero, there is no mechanical seek time involved. Defragmentation on that kind of media theoretically lessens the amount of I/O requests for sequentially reading files, but I believe this is not perceivable in real world scenarios. Contrary, those "needless" writes add additional wear on the storage cells by running strdskrgz, is lessening their overall lifetime somewhat.

:wq! PoC