Oh dear. I read the code too early in the morning.

It appears the table entry is missing for 895.

But things are worse. The code is too old for an 895.

We need to transfer /sys/src/9/pc/sd53c8xx.c to
/sys/src/fs/*/scsincr53c8xx.c, and also the microcode.

I run my fileserver on an 875 which is OK (just).