Bill,
Power supplies can fail at any time, and they are less reliable than any
other parts in my PC's.
PC's are more reliable if you leave them on, configured to go into sleep
mode when left unused (this statement will spark a discussion).
Most spinning disk drives these days support smartd, smartctl.
http://www.linuxjournal.com/magazine/monitoring-hard-disks-smart
An exception would be hardware RAID (shown below), its manufacturer
would supply management tools.
With smartctl, expect the failure counts to be non-zero, all disks have
errors which get remapped. The error counts can be alarming even though
the disk is fine for normal use. Any sudden increase in errors and you
will want to save some good backups Right Soon Now.
Spinning disks often fail gradually over days or weeks. SSDs can
suddenly drop completely, with no remedy.
cheers -- Rick
--RAID--
# smartctl --all /dev/sdb
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.11.3-300.fc26.x86_64]
(local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Vendor: HP
Product: LOGICAL VOLUME
Revision: 3.66
User Capacity: 1,200,186,941,440 bytes [1.20 TB]
Logical block size: 512 bytes
Rotation Rate: 15000 rpm
Logical Unit id: 0x600508b1001c4a3abee7e559b116e419
Serial number: 50014380145ECE10
Device type: disk
Local Time is: Wed May 31 01:58:57 2017 CDT
SMART support is: Unavailable - device lacks SMART capability.
--SSD--
root@lite:~# smartctl --all /dev/sda
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.10.0-20-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Samsung based SSDs
Device Model: Samsung SSD 850 EVO 250GB
Serial Number: S21NNS999999
..
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
..
--SATA--
# smartctl --all /dev/sdb
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.10.0-20-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: SAMSUNG SpinPoint F3
Device Model: SAMSUNG HD103SJ
Serial Number: S2QPJ9KB99999
..
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
..
----
On 2017-05-31 12:09 AM, William Mattison wrote:
I wasn't fully convinced these problems are due to the battery. That's why I listed the four things I found "odd". On the other hand, I recall hearing and reading that the output of lithium batteries is almost flat (better than any other type of battery), but then very quickly drops (faster than any other type of battery) as it reaches end-of-life.
Back to diagnosing the real cause of the problems...
Is there a Fedora command that I can use to check the hard drive (not the file systems) for bad blocks, sectors, tracks, etc? Is there a Fedora command that I can use to check the controller?
Both problems occurred immediately after doing a "dnf upgrade". What is that telling us? Does "dnf upgrade" access the hard drive or the controller in a way that normal daily use does not? Is there something different about the first boot after a "dnf upgrade" vs other boots? I shut down every night, and boot up every morning.
When I bought the system 4+ years ago, I bought separate parts. This is a DIY desktop. I was advised to buy more power supply than needed. I did so. So unless the power supply is failing, I would think it's not a good candidate for the cause of the two problems. There have been no problems until this month, and I've been doing weekly patches since I got the system in 2013.
I was/am not in the mood to change the battery! Since I've already bought the new one and have no other use for it, and since the old one is 4+ years old, I plan to change the battery either Friday or Saturday. But you know what they say: "If you want to make God laugh, tell Him your plans!". I did watch the youtube that Tim provided. I don't recall seeing screws on the underside of the motherboard. I'll look again Friday or Saturday (God willing!).
Thanks,
Bill.
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