I have installed Ubuntu 18.04.3 LTS on my laptop. The specs are:
Corei7
16 GB RAM
Seagate Firecuda 1 TB HDD ST1000LX015-1U71
The main partition is EXT4, and my home partition is ZFS
The system gets very slow at times (not always). The HDD light is on continously, but there is not much activity going on. Sync takes sometimes 7-8 mins to complete, the load average jumps to 10 or above and the io-wait goes to above 50%. The harddisk is brand new (just 11 days and 19 hours power on time).
The data I have collected is:
#time sync
real 3m37.626s
user 0m0.001s
sys 0m0.010s
#top
top - 10:00:03 up 1 day, 1:32, 1 user, load average: 11.52, 12.43, 8.58
Tasks: 420 total, 1 running, 363 sleeping, 0 stopped, 0 zombie
%Cpu(s): 6.6 us, 1.7 sy, 0.0 ni, 20.9 id, 70.8 wa, 0.0 hi, 0.2 si, 0.0 st
KiB Mem : 16267860 total, 1294616 free, 11784256 used, 3188988 buff/cache
KiB Swap: 15625212 total, 15403572 free, 221640 used. 2891476 avail Mem
#iostat -t 1 | grep sda
Device tps kB_read/s kB_wrtn/s kB_read kB_wrtn
sda 16.18 100.05 364.08 9185989 33429161
sda 10.00 224.00 0.00 224 0
sda 0.00 0.00 0.00 0 0
sda 29.00 952.00 2508.00 952 2508
sda 7.00 292.00 0.00 292 0
sda 0.00 0.00 0.00 0 0
sda 41.00 1684.00 1072.00 1684 1072
sda 0.00 0.00 0.00 0 0
sda 3.00 264.00 0.00 264 0
sda 18.00 896.00 36.00 896 36
#iotop
Total DISK READ : 147.96 K/s | Total DISK WRITE : 6.64 K/s
Actual DISK READ: 101.55 K/s | Actual DISK WRITE: 734.63 K/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
303 be/3 root 0.00 B/s 3.97 K/s 0.00 % 99.90 % [jbd2/sda2-8]
968 be/0 root 0.00 B/s 0.00 B/s 0.00 % 35.63 % [z_wr_iss]
969 be/0 root 0.00 B/s 0.00 B/s 0.00 % 35.63 % [z_wr_iss]
970 be/0 root 0.00 B/s 0.00 B/s 0.00 % 35.63 % [z_wr_iss]
972 be/0 root 0.00 B/s 0.00 B/s 0.00 % 17.77 % [z_wr_int]
7077 be/4 libvirt- 13.49 K/s 406.19 B/s 0.00 % 17.73 % qemu-system-x86_64 -enable-kvm -name guest=win7-1,debug-~d=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on [worker]
7245 be/4 libvirt- 13.49 K/s 0.00 B/s 0.00 % 15.31 % qemu-system-x86_64 -enable-kvm -name guest=win7-1,debug-~d=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on [worker]
7247 be/4 libvirt- 13.49 K/s 0.00 B/s 0.00 % 15.29 % qemu-system-x86_64 -enable-kvm -name guest=win7-1,debug-~d=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on [worker]
7251 be/4 libvirt- 812.38 B/s 1117.03 B/s 0.00 % 14.29 % qemu-system-x86_64 -enable-kvm -name guest=win7-1,debug-~d=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on [worker]
7069 be/4 libvirt- 13.49 K/s 0.00 B/s 0.00 % 14.14 % qemu-system-x86_64 -enable-kvm -name guest=win7-1,debug-~d=balloon0,bus=pci.0,addr=0x8 -msg timestamp=on [worker]
971 be/0 root 0.00 B/s 0.00 B/s 0.00 % 3.07 % [z_wr_iss_h]
It seems that the storage is very slow thus even small data transfers takes a long time, but I am not sure how to confirm which hardware component is faulty. Please help.