Re: hibernate area
On 9/11/24
01:04, Alexander V. Makartsev wrote:
In mean time, I enjoy fast performance of
SSD drives and keep an eye on them
using "smartd".
Does smartd warn you about impending death?
In a way, yes. SSDs and especially NVMe drives are vulnerable to
overheating, so temperature monitoring helps.
Checking selected SMART attributes also helps. Keep in mind, SMART
IDs often depend on drive's manufacturer and firmware.
Here are two specimens:
SATA SSD with MLC (2-bit) NAND:
https://paste.debian.net/hidden/3d073e37
NVMe SSD with TLC (3-bit) NAND:
https://paste.debian.net/hidden/e4bfff80
SATA SSD was used as system drive and attribute ID 9 tells us it was
online for 42414 hours (almost 5 years).
Attribute ID 12 counts times when it was powered on. PC is used
daily and rarely reboots, so 3843 times means this SSD is roughly
8-9 years old.
Attribute ID 231 indicates it has 95% of life left.
Attribute IDs 5, 187, 196 tell us there weren't any write errors
yet.
Attribute ID 233 shows total of 44TB written to NAND chips.
Smartd runs short self-tests on it every week and extended
self-tests every month.
It now serves mostly as VM storage after I upgraded system disk to
NVMe drive and in 5 years of normal use only 5% of its life was
spent.
NVMe SSD is now serves as system drive. SMART is slightly different
for NVMe drives and you can't run self-tests, but it still useful.
You still can monitor "Temperature", "Percentage Used", "Power on
Hours", "Integrity Errors", etc.
As you can see devices based on TLC (3-bit) 3D NAND chips are not
very durable in comparison to MLC (2-bit) NAND ones, but 4% of wear
per year is acceptable enough.
--
With kindest regards, Alexander.
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