Deleted - as I only appear to get answers from someone who knows nothing, yet thinks they know everything!
Why do you assume it shouldn’t be?
Deleted - as I only appear to get answers from someone who knows nothing, yet thinks they know everything!
TLER is more important on desktop / mobile drives than anywhere else.
WD fine-tunes TLER in the Reds because they’re more often in RAID arrays, where if a drive doesn’t respond to commands during a TLER event, the RAID controller could mark it bad, drop the drive, and go into a degraded mode.
In a non-RAID environment, the host will wait a long time for a TLER event to complete without issue. The host might hang for a bit, but it’s not going to drop the disk like a RAID controller will.
Thread deleted - as I only appear to get answers from someone who knows nothing, yet thinks they know everything!
You deleted your question because anyone reading the answer would know it was correct. Glad I could help!
And for anyone that comes across this post wonders what the question was, it was basically why TLER was enabled on WD Black drives, and if TLER is important on desktop drives.
and you said:
TLER is more important on desktop / mobile drives than anywhere else.
which proves you know nothing about TLER
The name TLER is a double-negative word. in the fact that if the TLER value is greater than 0, TLER is “disabled” and if it’s “0” it’s “Enabled” That’s backwards from most other uses of the term.
In any other sense, a non-zero number means “Enabled,” and Zero means “disabled.”
But Zero setting for TLER means “ENABLE” TLER. Makes great sense. Even Wikipedia gets it backwards / forwards in the same article.
So if TLER=70 (Which, IIRC, is 7 seconds), that’s DISABLING TLER, which means it ALLOWS the drive to recover for a long(er) period of time. That is what is important to desktop/mobile drives.
ENABLING TLER (which is setting the value to 0), means it will NOT try to recover from errors for a long(er) period of time. That’s what’s important for RAID arrays.
So a Non-Zero value for the TLER setting is what’s important for laptop/mobile drives.
TLER is not adjusted to low values in RAID arrays because the controller may drop the drive.
That’s a fallacy.
It’s adjusted to low values because having THAT DRIVE drop the data is less important than having the entire RAID array stop and wait 3-4 minutes for it - bearing in mind that the missing data can be supplied from the rest of the RAIDset
In a standalone drive you MUST NOT fiddle with this setting or you run a substantial risk of increased data loss. In a RAIDset you should set it to about 7 seconds or you’ll see long (unnecessary) hangs when an individual drive starts developing bad sectors
