Date: Fri, 2 Mar 2018 15:13:17 -0800 From: bob prohaska <fbsd@www.zefox.net> To: freebsd-arm@freebsd.org Subject: Can two USB flash drives conflict with each other? Message-ID: <20180302231317.GA37148@www.zefox.net>
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I just tried connecting a second SanDisk USB 3.0 flash drive to a Pi3 running -current. It's not precisely identical to the first, having a different activity indicator and being slightly older. Upon connection, the RPi3 console began emitting a continuous loop of error messages: (da0:umass-sim0:0:0:0): Error 5, Retries exhausted g_vfs_done():da0a[WRITE(offset=268632064, length=32768)]error = 5 g_vfs_done():da0a[WRITE(offset=825819136, length=32768)]error = 5 swap_pager: I/O error - pagein failed; blkno 2228,size 4096, error 5 gv_vfsm_done_f()aul:dt:a0 pa[aWger RIreTE(ofadfs eetr=ror,65 p536id, 1leng t(iniht) =4096)]error = 5 g_vfs_done():da0a[WRITE(offset=8585216, length=4096)]error = 5 (da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 08 01 80 00 00 40 00 (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error (da0:umass-sim0:0:0:0): Retrying command, 3 more tries remain This output seems to go on indefinitely, even after the offending flash drive was removed. Note the garbling in the 5th line of console output; it's been seen on rare occasions before, but never "on demand". A shutdown -r command stopped at Shutdown NOW! shutdown: [pid 3469] root@www:/usr/src # sh: /usr/bin/wall: Input/output error and the shell is now unresponsive. The console still has a login prompt, but never asks for a password. Looks like plug-pulling time. The obvious solution is "don't do that!", but if somebody can offer a more insightful explanation I'd be grateful. Using two USB flash drives simultaneously would be very useful. Thanks for reading, bob prohaska
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