The write error is unlikely - Powermac have new SSD, and have no errors (S.M.A.R.T, linux).
Snoopiun or debuglog is good idea, if we can repeat this error.
Up to now I didn't examine this, because it is marginal problem and I noticed every occurence until late - i.e. after reboot. Too late to check anything.
AmigaOS: Pegasos II, Sam440ep-flex, Micro A1-C, AmigaOneX1000
MorphOS: Pegasos II, Powerbook G4, iMac G5, Powermac G5 Quad