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I recently received and installed a 3TB drive. Before formatting it, I |
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zeroed the first GiB (dd if=/dev/zero of=/dev/sdb bs=1M count=1024). |
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Then formatted with gdisk. |
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|
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Both gdisk and parted report the partition table correctly as containing a |
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~1MB (empty) sdb1 and ~2.7TB sdb2 (with a protective MBR). However, on boot, |
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only one partition is recognized: the 1MB sdb1. And yet after running |
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partprobe, sdb2 will magically appear. |
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|
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I've managed to work around this for now with a /etc/local.d/ file that |
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just does "partprobe; mount /home" but I'd like to figure out the underlying |
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cause... Has anyone ever run into this before? |
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|
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# grep sdb /var/log/messages |
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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) |
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Dec 9 01:38:49 precision kernel: [ 1.228246] sd 1:0:0:0: [sdb] 4096-byte physical blocks |
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Dec 9 01:38:49 precision kernel: [ 1.230017] sd 1:0:0:0: [sdb] Write Protect is off |
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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 |
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Dec 9 01:38:49 precision kernel: [ 1.245054] sdb: sdb1 |
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Dec 9 01:38:49 precision kernel: [ 1.247172] sd 1:0:0:0: [sdb] Attached SCSI disk |
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Dec 9 01:38:57 precision kernel: [ 23.777108] sdb: sdb1 |
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Dec 9 01:38:58 precision kernel: [ 25.120921] EXT4-fs (sdb2): mounted filesystem with ordered data mode. Opts: (null) |
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|
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# gdisk -l /dev/sdb |
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GPT fdisk (gdisk) version 1.0.1 |
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|
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Partition table scan: |
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MBR: protective |
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BSD: not present |
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APM: not present |
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GPT: present |
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|
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Found valid GPT with protective MBR; using GPT. |
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Disk /dev/sdb: 5860533168 sectors, 2.7 TiB |
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Logical sector size: 512 bytes |
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Disk identifier (GUID): 0A8A7DB1-45D0-44DD-AACB-1A4957077401 |
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Partition table holds up to 128 entries |
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First usable sector is 34, last usable sector is 5860533134 |
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Partitions will be aligned on 2048-sector boundaries |
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Total free space is 2014 sectors (1007.0 KiB) |
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|
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Number Start (sector) End (sector) Size Code Name |
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1 2048 4095 1024.0 KiB 8300 Linux filesystem |
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2 4096 5860533134 2.7 TiB 8300 Linux filesystem |
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|
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# parted -l |
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[...] |
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Model: ATA ST3000DM001-1ER1 (scsi) |
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Disk /dev/sdb: 3001GB |
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Sector size (logical/physical): 512B/4096B |
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Partition Table: gpt |
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Disk Flags: |
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|
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Number Start End Size File system Name Flags |
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1 1049kB 2097kB 1049kB Linux filesystem |
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2 2097kB 3001GB 3001GB ext4 Linux filesystem |
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[...] |
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