[19:09] <p01nt3r> hello. i got the problem that my internal devices aren't recognized when i use the dd command... is there something like a limitation for drives to be detected, maybe on the kernel side during a dd command execution? 
[19:10] <p01nt3r> i'm talking about a bay with changeable devices on the sata-port
[19:12] <sixwheeledbeast> I doubt it would be dd, not mounted or wrong mount point?
[19:12] <p01nt3r> last time it seemed that the drives wheren't recognized anymore at all, even after reboot. had to rewrite my whole uefi-system to get it back working
[19:13] <p01nt3r> if i write to an usb-device with dd and put a removable sata-ssd into the internal bay, the drive is not more recognized.
[19:14] <p01nt3r> last time i got strange messages:
[19:15] <p01nt3r> mtd device must be supplied (device name is empty)
[19:16] <p01nt3r> since i rewrote the uefi, this message is gone
[19:16] <p01nt3r> or does this have nothing to do with dd?
[19:19] <p01nt3r> dmesg gave also some strange lines:
[19:19] <p01nt3r> unknown parameter 'windows_names'
[19:20] <p01nt3r> ata6: sata link down (sstatus 0 scontrol 300)
[19:20] <p01nt3r> ata6.00: disabled
[19:21] <p01nt3r> ata6.00: detaching (SCSI 5:0:0:0)
[19:21] <p01nt3r> sd 5:0:0:0 [sdc] stopping disk
[19:22] <p01nt3r> sd 5:0:0:0 [sdc] start/stop unit failed: result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_=K
[19:22] <p01nt3r> sd 5:0:0:0 [sdc] start/stop unit failed: result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[19:22] <p01nt3r> what can this be?
[19:27] <p01nt3r> important to mention: after every reboot the drive was recognized again, but not at hotswap.
[19:28] <p01nt3r> i already thought the hotswap-module in my uefi was broken...
[19:28] <p01nt3r> or sata-module (or whatever)
[19:30] <p01nt3r> and after i reused dd again, i tested to put in an ssd into the bay, but it wasn't recognized for the time dd was running (and the time after, until reboot)
[19:33] <p01nt3r> (after i rewrote the uefi)
[19:33] <p01nt3r> could this be something like maybe a kernel-bug?
[19:34] <p01nt3r> or bug in dd?
[20:03] <p01nt3r> dd-flags were: bs=4M oflag=nocache,sync status=noxfer