I've got a weird problem with my Ubuntu Ubuntu 20.04.1. Actually release version doesn't matter because the problem was even before release upgrade. During every boot the system does something for 2 minutes. dmesg shows following:
[ 3.882138] ata3.00: ATA-10: ST2000DM008-2FR102, 0001, max UDMA/133
[ 3.882831] ata3.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 32), AA
[ 3.933436] ata3.00: configured for UDMA/133
[ 3.934299] scsi 2:0:0:0: Direct-Access ATA ST2000DM008-2FR1 0001 PQ: 0 ANSI: 5
[ 3.935284] sd 2:0:0:0: Attached scsi generic sg1 type 0
[ 3.935293] sd 2:0:0:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB)
[ 3.936220] scsi 3:0:0:0: Direct-Access ATA ST2000DX002-2DV1 CC41 PQ: 0 ANSI: 5
[ 3.936749] sd 2:0:0:0: [sdb] 4096-byte physical blocks
[ 3.937663] sd 3:0:0:0: Attached scsi generic sg2 type 0
[ 3.937710] sd 3:0:0:0: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB)
[ 3.937711] sd 3:0:0:0: [sdc] 4096-byte physical blocks
[ 3.937719] sd 3:0:0:0: [sdc] Write Protect is off
[ 3.937720] sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 3.937732] sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 3.938193] sd 2:0:0:0: [sdb] Write Protect is off
[ 3.942949] sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 3.942960] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 3.951078] sdc: sdc1
[ 3.951910] sd 3:0:0:0: [sdc] Attached SCSI disk
[ 3.991298] sd 2:0:0:0: [sdb] Attached SCSI disk
[ 4.013571] random: fast init done
[ 4.028472] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 4.028473] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 4.028504] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 4.153986] raid6: sse2x4 gen() 15011 MB/s
[ 4.201978] raid6: sse2x4 xor() 10212 MB/s
[ 4.249981] raid6: sse2x2 gen() 12737 MB/s
[ 4.297979] raid6: sse2x2 xor() 8628 MB/s
[ 4.345979] raid6: sse2x1 gen() 10930 MB/s
[ 4.393982] raid6: sse2x1 xor() 7474 MB/s
[ 4.394456] raid6: using algorithm sse2x4 gen() 15011 MB/s
[ 4.394916] raid6: .... xor() 10212 MB/s, rmw enabled
[ 4.395369] raid6: using ssse3x2 recovery algorithm
[ 4.396664] xor: automatically using best checksumming function avx
[ 4.397942] async_tx: api initialized (async)
[ 4.405574] device-mapper: raid: Loading target version 1.14.0
[ 4.428421] md/raid1:mdX: active with 2 out of 2 mirrors
[ 9.604725] random: crng init done
[ 9.605236] random: 8 urandom warning(s) missed due to ratelimiting
[ 120.809255] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null)
[ 132.661535] systemd[1]: Inserted module 'autofs4'
/etc/fstab output:
# <file system> <mount point> <type> <options> <dump> <pass>
UUID=5b736f72-d735-45ca-a5db-fd0a4eef2fa7 / ext4 errors=remount-ro 0 1
UUID=C824-BAB7 /boot/efi vfat defaults 0 1
UUID=d986c290-d182-474b-a05b-91b649aea538 none swap sw 0 0
UUID=942e0b01-4bf8-4dfe-a9ee-5d4a59dcb0ce /mnt/mirror ext4 errors=remount-ro,x-systemd.device-timeout=300 01
UUID=f2c269d7-9346-4686-b697-325d44ad1023 /mnt/storage ext4 errors=remount-ro 0 1
When I look at the monitor during boot I see something regarding checking the root file system. But later on I can't find this entry anywhere in the logs. Also during this 2 minutes pause I hear heavy usage of the HDD although my root file system is located on SDD (I have 2 mirrored HDDs).
What could it be? Not that it's a big problem but annoys a little.
