A diskdrive's state becomes compromised surreptitiously

Claus Debanker 21

By invoking an analysis of a storage disk with 'defrag /A', it is discovered that the largest free block is highly disproportionate to the actual free size. This is discovered after the Event ID 154 has made its appearance in Event Viewer with relevant symptoms of disk errors, need for chkdsk.exe, corrupting files, failures.

The largest free block is restored to its expected nominal value by shrinking disk size as closely to the data boundary and extending it back again. Most or all symptoms subside, noises, problematic scans from chkdsk.exe, bad clusters; two Surface Tests on the disk indicate no issue.

Possible causes for the offsided largest block count in the 'reclaiming of space' by updating applications, the protected folders access or the protected memory access.

But how is Event ID 154 involved to this?

https://learn.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/disk-event-id-154

The reference there is an adapter, a switch, or a storage array. Are those integrated parts of a baseboard?

(At one point the intensity of the Event ID 154 had time enough to stretch the disk into two fatal failures with WHEA-Logger ID 1)

Claus Debanker 21 Reputation points

2024-07-28T14:05:14.54+00:00

For example at this point a source of corruption was detected and an index entry was deleted if to report in events that 'the drive is healthy and no further action is required'; now to my estimation, there has been a decrease in the largest free block by a 15% in contrast to the initial one detected at about 85% with the 'defrag /A' tool. This made for an isolated incident with one index entry, like making a start for. (fsutil dirty query & wmic diskdrive status are cleared through for now)
Claus Debanker 21 Reputation points

2024-07-28T14:54:57.24+00:00

The origin of the latest corruption is designated as 'unknown' and the only option available appears to be a reformatting of a grand storage drive that cannot be backed up;

https://learn.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/disk-space-problems-on-ntfs-volumes?source=recommendations

According to this document the cluster size can be changed for a new format, and that's more like a post-reaction to an unknown origin which may have its continuation nonetheless?

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A diskdrive's state becomes compromised surreptitiously