This bug also affects the installer.
For the last 2 days I have been trying to install Slackware15 on a Dell R720 with a PERC H710P mini, via iDRAC with /usb-and-pxe-installers/usbboot.img as virtual media, and when /var/lib/pkgtools/setup/setup.80.make-bootdisk runs after initial install, it trashes all SCSI devices.
I even tried to run it just after installer loads without running `setup`, same issue. Only reboot takes you out of this issue.
I tried --forcerescan aqnd --forceremove, and sda and sdb still do not come back.
The virtual media on sdc works OK after running rescan-scsi-bus.
In the end to be able to successfuly install:
1. run setup as usual
2. wait until a/pkgtools-15.0-noarch-42 is installed
3. `vi /mnt/var/lib/pkgtools/setup/setup.80.make-bootdisk`
3.1. comment the line where " /sbin/rescan-scsi-bus -l 1>$RDIR 2>$RDIR" is.
4. mv /sbin/rescan-scsi-bus /sbin/rescan-scsi-bus.no
4.1. call me paranoid
PERC H710P mini is reported in lspci as:
02:00.0 RAID bus controller: Broadcom / LSI MegaRAID SAS 2208 [Thunderbolt] (rev 05)