Wikipedia:Reference desk/Archives/Computing/2016 May 20

= May 20 =

Detecting ip addresses of forum accounts
How do I detect an IP address of an online forum account?
 * You probably can't.  Just like you can't see the IP address of editors here unless they did not log in.   RudolfRed (talk) 02:18, 20 May 2016 (UTC)
 * As was mentioned, you can't, unless you have the needed administrator or moderator access on that forum to do so. If you're asking because another forum user is possibly violating the rules, you should contact that forum's staff. RegistryKey(RegEdit) 05:08, 20 May 2016 (UTC)

Switching disks under LVM
I have now successfully installed LVM on two separate 6 TB disks under Fedora 23 Linux. What would happen if I were to accidentally switch the SATA cables around? Would the system be unable to find the volumes, or would it work normally? J I P &#124; Talk 20:12, 20 May 2016 (UTC)


 * This answer suggests that, although you may have created the LVM volume(s) using physical drive names (/dev/sda, etc.), the LVM config uses uuids to uniquely identify disks - which should be resistant to simple rewiring snafus. But I've no personal experience of LVM (only using uuids in vanilla fstab), so I can't fully vouch for that. -- Finlay McWalter··–·Talk 20:24, 20 May 2016 (UTC)


 * An anecdote... When I first set up an LVM, it was on a laptop that had no internal removable media. So, I plugged in a USB DVD to install from. It installed as SDA and the harddrive was SDB. (I know - why do LVM with one drive - that's not the point.) After install, I removed the DVD drive and the harddrive became SDA on reboot. The LVM still worked just fine. The only trouble I had was with grub in /boot. It had hard-coded SDB in the boot sequence, so I had to alter it to get it to boot. Therefore, from the early days of LVM through today, having the drives shuffle around doesn't affect LVM. 199.15.144.250 (talk) 11:43, 23 May 2016 (UTC)