Hello archers, I'm running Arch Linux on an Acer Aspire One D257 [1]. Since last month, I've notices these messages showing up during the boot process: (from dmesg | less) [ 6.714686] Bad LUN (0:1) [ 6.715042] Bad target number (1:0) [ 6.715437] sd 4:0:0:0: [sdb] Attached SCSI removable disk #I usally don't see this one [ 6.715733] Bad target number (2:0) [ 6.716020] Bad target number (3:0) [ 6.716308] Bad target number (4:0) [ 6.716594] Bad target number (5:0) [ 6.716937] Bad target number (6:0) [ 6.717225] Bad target number (7:0) Just before the aforementioned messages, I see also: (this time from less /var/log/everything.log ) [ 5.730996] acer_wmi: No or unsupported WMI interface, unable to load I don't know if these messages are connected (I don't think so) Apparently, this doesn't lead to further problems. My google searches did not return anything useful, except that others experienced similar messages; there is even one thread in the Arch Forum [2], but didn't get much attention. As far as I can see, there are no bug reports or documentation concerning messages like these. It seems something regarding SD card reader... Now, I'm wondering: - Is it a known problem? - What do these messages mean? - Can it cause problems or harm my hardware? Should I be worried? - Should I fill a bug report...? Now, some output: # ls /sys/block/ sda sdb # cat /proc/partitions major minor #blocks name 8 0 244198584 sda 8 1 104391 sda1 8 2 2048287 sda2 8 3 51207187 sda3 8 4 190836135 sda4 # fdisk -l Disk /dev/sda: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00097750 Device Boot Start End Blocks Id System /dev/sda1 * 63 208844 104391 83 Linux /dev/sda2 208845 4305419 2048287+ 82 Linux swap / Solaris /dev/sda3 4305420 106719794 51207187+ 83 Linux /dev/sda4 106719795 488392064 190836135 83 Linux # cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: Hitachi HTS54322 Rev: ESBO Type: Direct-Access ANSI SCSI revision: 05 Host: scsi4 Channel: 00 Id: 00 Lun: 00 Vendor: Generic- Model: xD/SD/M.S. Rev: 1.00 Type: Direct-Access ANSI SCSI revision: 02 #cat /etc/fstab # # /etc/fstab: static file system information # # <file system> <dir> <type> <options> <dump> <pass> tmpfs /tmp tmpfs nodev,nosuid 0 0 UUID=0d3cf67e-565e-495c-bac8-66dfd290b882 /boot ext2 defaults 0 1 UUID=21b920dc-54a0-43a5-9e37-e7c7e85e4cba /home ext4 defaults,noatime,nodiratime 0 1 UUID=5d8f2ea7-de29-4972-a127-0ea2363d65fd swap swap defaults 0 0 UUID=784fbd71-712f-4b1f-9ea7-f2c681cdbbda / ext4 defaults,noatime,nodiratime 0 1 [1] http://us.acer.com/ac/en/US/content/model/LU.SFS0D.002 [2] https://bbs.archlinux.org/viewtopic.php?id=124139 Thanks to everyone. Best regards, Lorenzo