Hmm, this is getting more interesting:
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.5571825] umass1 at uhub2 port 1 configuration 1 interface 0
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.5601839] umass1: TEACV0.0 (0x0644) TEACV0.0 (0x0000), rev 1.10/2.00, addr 3
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.5671868] umass1: using UFI over CBI with CCI
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.5681880] atapibus0 at umass1: 2 targets
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.6382151] sd1 at atapibus0 drive 0: <TEAC, USB UF000x, 0.00> disk removable
Nov 14 20:55:17 arm64 /netbsd: [ 1632637.5163701] sd1: 1440 KB, 80 cyl, 2 head, 18 sec, 512 bytes/sect x 2880 sectors
tail -f /var/log/messages on one console, and:
# scsictl sd1 format
/dev/rsd1: Check Condition on CDB: 1a 00 03 00 24 00
SENSE KEY: No Additional Sense
ASC/ASCQ: No Additional Sense Information
came out this time! NO console messages.
Now, unplug, and re-plug the USB in:
Nov 15 23:42:22 arm64 /netbsd: [ 1728677.3990874] sd1(umass1:0:0): not ready, data = "" 00 00 00 3a 00 00 00 00 00
Nov 15 23:42:22 arm64 /netbsd: [ 1729062.2630115] sd1: detached
Nov 15 23:42:22 arm64 /netbsd: [ 1729062.2630115] atapibus0: detached
Nov 15 23:42:22 arm64 /netbsd: [ 1729062.2670131] umass1: detached
Nov 15 23:42:22 arm64 /netbsd: [ 1729062.2700137] umass1: at uhub2 port 1 (addr 3) disconnected
Nov 15 23:42:29 arm64 /netbsd: [ 1729069.0440298] umass1 at uhub2 port 1 configuration 1 interface 0
Nov 15 23:42:29 arm64 /netbsd: [ 1729069.0480306] umass1: TEACV0.0 (0x0644) TEACV0.0 (0x0000), rev 1.10/2.00, addr 3
Nov 15 23:42:29 arm64 /netbsd: [ 1729069.0550327] umass1: using UFI over CBI with CCI
Nov 15 23:42:29 arm64 /netbsd: [ 1729069.0560337] atapibus0 at umass1: 2 targets
Nov 15 23:42:29 arm64 /netbsd: [ 1729069.1262885] sd1 at atapibus0 drive 0: <TEAC, USB UF000x, 0.00> disk removable
Nov 15 23:42:30 arm64 /netbsd: [ 1729069.9404460] sd1: 1440 KB, 80 cyl, 2 head, 18 sec, 512 bytes/sect x 2880 sectors
Try again:
# scsictl sd1 format
/dev/rsd1: Check Condition on CDB: 1a 00 03 00 24 00
SENSE KEY: No Additional Sense
ASC/ASCQ: No Additional Sense Information
Same as before. No messages is /var/log/messages
--------------------
I see other unexpected behavior; when I copy to identical files that are exactly 1/2 of 1.4 MB long
# ll f1 f2
-rw-r--r-- 1 mac wheel 737280 Nov 15 02:53 f1
-rw-r--r-- 1 mac wheel 737280 Nov 15 02:54 f2
Each of these is 1440 sectors (std 512-byte sectors); I know the diskette is 'perfect' (no defects), yet when I write both of these files to the mounted "/a" filesystem, only f1 gets fully written, and then it complains there's not enough room for f2:
# cp f2 /a
cp: /a/f2: No space left on device
arm64# ll /a
total 2592
-rwxr-xr-x 1 root wheel 737280 Nov 15 08:06 f1*
-rwxr-xr-x 1 root wheel 589824 Nov 15 23:59 f2*
If I rm /a/f2 and then write it again, there is even less 'space':
# rm /a/f2
arm64# cp f2 /a
cp: /a/f2: No space left on device
arm64# ll /a
total 1568
-rwxr-xr-x 1 root wheel 737280 Nov 15 08:06 f1*
-rwxr-xr-x 1 root wheel 65536 Nov 16 00:00 f2*
Thanks, again for any pointers / suggestions.