Date: Sat, 28 Nov 2020 16:50:04 +0100 From: Andrea Venturoli <ml@netfence.it> To: freebsd-questions@freebsd.org Cc: bdrewery@FreeBSD.org Subject: Errors with snapshots (testing sysutils/zfstools) Message-ID: <5af06726-3cb6-0183-265c-7d2831798738@netfence.it>
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Hello. I'm testing sysutils/zfstools, which will create hourly snapshots of all my ZFS pools, on a 12.2 box. However, I see in the logs, every hour, the following messages: > kernel: g_dev_taste: make_dev_p() failed (gp->name=zvol/zroot/vm/win10test/disk0@zfs-auto-snap_hourly-2020-11-28-16h00, error=63) > kernel: g_dev_taste: make_dev_p() failed (gp->name=zvol/zroot/vm/win10test/disk0@zfs-auto-snap_hourly-2020-11-28-16h00p1, error=63) > kernel: g_dev_taste: make_dev_p() failed (gp->name=zvol/zroot/vm/win10test/disk0@zfs-auto-snap_hourly-2020-11-28-16h00p2, error=63) > kernel: g_dev_taste: make_dev_p() failed (gp->name=zvol/zroot/vm/win10test/disk0@zfs-auto-snap_hourly-2020-11-28-16h00p3, error=63) > kernel: g_dev_taste: make_dev_p() failed (gp->name=zvol/zroot/vm/win10test/disk0@zfs-auto-snap_hourly-2020-11-28-16h00p4, error=63) Now: _ win10test is a zvol: I'm not really interested in it and I could disable snapshots on it (or even delete it), but I want to understand things; _ looking for this in forums, I see someone suggesting error 63 means the snapshot name is too long; that's strange, as I've got even longer names (not zvol, though); _ anyway, if it's true, I guess snapshot should not be created, but they are there; they also get deleted the next hour, since this volume is not in use, so there's really no change; _ I tried this on a different machine (still at 12.1) and I get a different message: > kernel: ZFS WARNING: Unable to create ZVOL zroot/vm/win10test/disk0@zfs-auto-snap_hourly-2020-11-28-16h00 (error=63). Still the snapshots are there. _ I guess ...p1, ...p2, ...p3, ...p4 refers to the partitions on the volume (in fact listed in /dev/zvol/zroot/vm/win10test/); I guess this should not be attempted at all (bug in zfstools?); _ I've seen https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215067 and it's quite scary. Do we have to pay attention not too create too long names? bye & Thanks av.
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