Hello, the external USB drive recently stopped being recognized at all by this server. FreeBSD files.local 11.4-RELEASE-p2 FreeBSD 11.4-RELEASE-p2 #0: Tue Aug 4 19:21:02 UTC 2020 root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 This setup has worked for over 2 years, unfortunately I cannot tell to which date, or to which update it correlates to. This server is updated with freebsd-update and pkg (binary packages only), typically a few days after any security advisory comes out. Currently nothing happens when I attach or remove the drive from tany USB port of the Supermicor X8SIL motherboard. No BIOS changes were made in over a year. At this time, neither dmesg, usbconfig devlist nor camcontrol show the disk. I tried rollback from 11.3-RELEASE-p12 to 11.3-RELEASE-p11 and that did not work either, before upgrading all the way to 11.4-RELEASE-p2. What debugging should I try next? The disk is recognized OK on a CentOS 7 server with similar hardware and on my MacbookPro. I do have an older dmesg excerpt from when it had kernel 11.3-RELEASE-p11 and it still worked: ugen1.3: <JMicron JMS579> at usbus1 umass0 on uhub2 umass0: <JMicron JMS579, class 0/0, rev 2.10/32.02, addr 3> on usbus1 umass0: SCSI over Bulk-Only; quirks = 0x8100 umass0:4:0: Attached to scbus4 da0 at umass-sim0 bus 0 scbus4 target 0 lun 0 da0: <INTEL SS DSC2BA012T4 3202> Fixed Direct Access SPC-4 SCSI device da0: Serial Number 24865351072710207E da0: 40.000MB/s transfers da0: 1144641MB (2344225968 512 byte sectors) da0: quirks=0x2<NO_6_BYTE> Thanks, andreas -- Andreas Ott andreas at naund.org