On 07/31/2016 06:37 AM, Jörg Schaible wrote: > Hi, > > for my backups I use a 3TB USB drive (one big ext4 partition) without any > problems. Just plug in the cable, mount it and perform the backup. The > partition (sdi1) is detected an mountable without any problems: > > =============== %< ============== > $ ls -l /dev/disk/by-id > total 0 > lrwxrwxrwx 1 root root 9 Jul 31 13:17 ata- > Crucial_CT500MX200SSD1_161512468483 -> ../../sda > lrwxrwxrwx 1 root root 10 Jul 31 13:17 ata- > Crucial_CT500MX200SSD1_161512468483-part1 -> ../../sda1 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 ata- > Crucial_CT500MX200SSD1_161512468483-part2 -> ../../sda2 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 ata- > Crucial_CT500MX200SSD1_161512468483-part3 -> ../../sda3 > lrwxrwxrwx 1 root root 9 Jul 31 13:17 ata-HL-DT-ST_DVDRAM_GH41N_K5Q9AN32423 > -> ../../sr0 > lrwxrwxrwx 1 root root 9 Jul 31 15:20 ata-ST3000DM001-1CH166_Z1F45VR9 -> > ../../sdi > lrwxrwxrwx 1 root root 10 Jul 31 15:20 ata-ST3000DM001-1CH166_Z1F45VR9-part1 > -> ../../sdi1 > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-Generic- > _Compact_Flash_20060413092100000-0:0 -> ../../sdc > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-Generic-_MS_MS- > Pro_20060413092100000-0:3 -> ../../sdf > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-Generic- > _SD_MMC_20060413092100000-0:2 -> ../../sde > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-Generic-_SM_xD- > Picture_20060413092100000-0:1 -> ../../sdd > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-Generic_Flash_HS- > CF_26020128B005-0:0 -> ../../sdg > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-Generic_Flash_HS- > COMBO_26020128B005-0:1 -> ../../sdh > lrwxrwxrwx 1 root root 9 Jul 31 13:17 usb-INTENSO_USB_AA04012900007518-0:0 > -> ../../sdb > lrwxrwxrwx 1 root root 10 Jul 31 13:17 usb-INTENSO_USB_AA04012900007518-0:0- > part1 -> ../../sdb1 > lrwxrwxrwx 1 root root 9 Jul 31 15:20 wwn-0x5000c50065531ec5 -> ../../sdi > lrwxrwxrwx 1 root root 10 Jul 31 15:20 wwn-0x5000c50065531ec5-part1 -> > ../../sdi1 > lrwxrwxrwx 1 root root 9 Jul 31 13:17 wwn-0x5001480000000000 -> ../../sr0 > lrwxrwxrwx 1 root root 9 Jul 31 13:17 wwn-0x500a075112468483 -> ../../sda > lrwxrwxrwx 1 root root 10 Jul 31 13:17 wwn-0x500a075112468483-part1 -> > ../../sda1 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 wwn-0x500a075112468483-part2 -> > ../../sda2 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 wwn-0x500a075112468483-part3 -> > ../../sda3 > =============== %< ============== > $ ls -l /dev/disk/by-label > total 0 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 boot -> ../../sda1 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 gentoo -> ../../sda3 > lrwxrwxrwx 1 root root 10 Jul 31 15:20 intenso -> ../../sdi1 > lrwxrwxrwx 1 root root 10 Jul 31 13:17 swap -> ../../sda2 > =============== %< ============== > > However, when I boot a rescue system from a USB stick, the partition on the > USB is not detected. I already tried latest SystemRescueCD (default and > alternate kernel), Knoppix and the Gentoo Admin CD. Nothing, the partition > is not available. > > What's the difference? Why does my kernel find this partition and the other > one's do not? It's pretty silly to have a backup drive and cannot access it > in question ;-) > > - Jörg > >
I can only think of two reasons, the kernel on the livecd doesn't support GPT (which is unlikely) or you're booting a 32-bit kernel live USB. I am reasonably certain for drives > 2TB a 64-bit kernel and GPT are required. Dan
