Its not a boot disk. / and /boot are on 500GB, MBR-only sda. BIOS is ~2011 i'd guess. Its a Dell.
"J. Roeleveld" <jo...@antarean.org> wrote: >On Wednesday, December 09, 2015 03:19:45 AM John Runyon wrote: >> I recently received and installed a 3TB drive. Before formatting it, I >> zeroed the first GiB (dd if=/dev/zero of=/dev/sdb bs=1M count=1024). >> Then formatted with gdisk. >> >> Both gdisk and parted report the partition table correctly as containing a >> ~1MB (empty) sdb1 and ~2.7TB sdb2 (with a protective MBR). However, on boot, >> only one partition is recognized: the 1MB sdb1. And yet after running >> partprobe, sdb2 will magically appear. >> >> I've managed to work around this for now with a /etc/local.d/ file that >> just does "partprobe; mount /home" but I'd like to figure out the underlying >> cause... Has anyone ever run into this before? >> >> # grep sdb /var/log/messages >> Dec 9 01:38:49 precision kernel: [ 1.224703] sd 1:0:0:0: [sdb] >> 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB) Dec 9 01:38:49 >> precision kernel: [ 1.228246] sd 1:0:0:0: [sdb] 4096-byte physical >> blocks Dec 9 01:38:49 precision kernel: [ 1.230017] sd 1:0:0:0: [sdb] >> Write Protect is off Dec 9 01:38:49 precision kernel: [ 1.231765] sd >> 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support >> DPO or FUA Dec 9 01:38:49 precision kernel: [ 1.245054] sdb: sdb1 >> Dec 9 01:38:49 precision kernel: [ 1.247172] sd 1:0:0:0: [sdb] Attached >> SCSI disk Dec 9 01:38:57 precision kernel: [ 23.777108] sdb: sdb1 >> Dec 9 01:38:58 precision kernel: [ 25.120921] EXT4-fs (sdb2): mounted >> filesystem with ordered data mode. Opts: (null) >> >> # gdisk -l /dev/sdb >> GPT fdisk (gdisk) version 1.0.1 >> >> Partition table scan: >> MBR: protective >> BSD: not present >> APM: not present >> GPT: present >> >> Found valid GPT with protective MBR; using GPT. >> Disk /dev/sdb: 5860533168 sectors, 2.7 TiB >> Logical sector size: 512 bytes >> Disk identifier (GUID): 0A8A7DB1-45D0-44DD-AACB-1A4957077401 >> Partition table holds up to 128 entries >> First usable sector is 34, last usable sector is 5860533134 >> Partitions will be aligned on 2048-sector boundaries >> Total free space is 2014 sectors (1007.0 KiB) >> >> Number Start (sector) End (sector) Size Code Name >> 1 2048 4095 1024.0 KiB 8300 Linux filesystem >> 2 4096 5860533134 2.7 TiB 8300 Linux filesystem >> >> # parted -l >> [...] >> Model: ATA ST3000DM001-1ER1 (scsi) >> Disk /dev/sdb: 3001GB >> Sector size (logical/physical): 512B/4096B >> Partition Table: gpt >> Disk Flags: >> >> Number Start End Size File system Name Flags >> 1 1049kB 2097kB 1049kB Linux filesystem >> 2 2097kB 3001GB 3001GB ext4 Linux filesystem >> [...] > >How old is the BIOS in your system? > >Older systems have issues recognizing disks larger than 2TB, Linux has a >history of being able to ignore that. I am not sure how that works with boot- >disks though. > >-- >Joost >
