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Old 07-02-2019, 10:37 AM   #16
helen314
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Few more comments
I always run "grub" in text mode and when "fstab" was optioned wrong I get into "emergency mode".
I can also run optional "start up " mode in "grub" .
I am not sure about the correct name of this option.
After I changed "defaults" to "default" this "startup" mode actually pointed it to me.
It printed that "default" is a wrong option.

I do understand that casual user is really not interested in chasing problems, but it seems that Linux is not too keen to identify problem unless one jumps thru the hoops.
 
Old 07-02-2019, 12:14 PM   #17
helen314
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This may be dupe - my PC crashed


Few more comments
I always run "grub" in text mode and when "fstab" was optioned wrong I get into "emergency mode".
I can also run optional "start up " mode in "grub" .



I am not sure about the correct name of this option.


"advanced option " -> "upstart"


After I changed "defaults" to "default" this "startup" mode actually pointed it to me.
It printed that "default" is a wrong option.

I do understand that casual user is really not interested in chasing problems, but it seems that Linux is not too keen to identify problem unless one jumps thru the hoops.
 
Old 07-02-2019, 10:44 PM   #18
mrmazda
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This seems a problem better asked somewhere that would attract more attention from RAID people than in "Newbie". You may well be a RAID newbie, but less likely a Linux newbie. Perhaps ask in general, kernel or software.
 
Old 07-02-2019, 11:08 PM   #19
helen314
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Quote:
Originally Posted by mrmazda View Post
This seems a problem better asked somewhere that would attract more attention from RAID people than in "Newbie". You may well be a RAID newbie, but less likely a Linux newbie. Perhaps ask in general, kernel or software.
True, SOME questions are very specific and should be posted in "right pew".
From few years of playing with Linux I see that rudimentary problems are covered in tutorials.
In this case there were plenty of replies as far as "you put this text in fstab". Where it got muddied was how to tie grub, blkid and others with fstab. That is no subject of tutorials.
This , and in my opinion very fruitful discussion "uncovered " some possible means to improve interaction with these "functions".
That is, again in my opinion, something people who build these function should be paying attention to , not the other way around.

At least they should if the are curious how "their software" is making Linux better or more "user" friendly.

I have not seen similar "show stopper" as when "fstab" has wrong options , but as I said before - this is something a user who just uses Linux to read e-mails would be not exposed to.

Besides - who really uses RAID when hard drives are much more reliable than 30 - 40 years ago?

Anybody who is paranoid , OK - cares about not loosing family pictures , uses "cloud" anyway.

Cheers
 
Old 07-03-2019, 09:30 PM   #20
rnturn
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Quote:
Originally Posted by mrmazda View Post
It's more or less right there in man fstab:
Code:
mount -fav
Ha! "--fake" whoda thunk it.

A couple of years ago a project manager came to me and asked for an audit of all the command line switches used by all the various programs that had been written up to that point for the project. I think he was under the impression that the development teams were all talking to each other and the switches were being used consistently. Man, was he wrong.
 
Old 07-03-2019, 09:59 PM   #21
rnturn
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Quote:
Originally Posted by dc.901 View Post
Agree with mrmazda to use LABEL instead.
You could also use UUID.

Only once in my career I tried to use RAID5 on drives installed in USB enclosure. It was a disaster; it was extremely unstable as it crashed frequently. (it was on USB3, and several years ago). May be things have improved?
I tried several years ago to build RAID devices in an external USB3 enclosure. (It was either USB3 or eSATA but I could never get the eSATA connection to work reliably.) I wound up giving up on it as a RAID enclosure. I wound up using it as JBOD via the USB3 connection.

Be careful what sort of disks you try to use to build the RAID. I've found that the WD "Red" disks have been the best for creating RAID devices. Many of the consumer-grade SATA drives (the "Blues", "Greens", "Blacks", etc.) have long timeouts during operation that caused the system to think the device was broken and the RAID device would go offline. Read the detailed information (may come with the disk but should be on the manufacturer's web site) to see. If memory serves, the problem arose if the disk detected a bad block and initiated a long block replacement/re-mapping process.
 
Old 07-03-2019, 10:22 PM   #22
rnturn
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Quote:
Originally Posted by helen314 View Post
True, SOME questions are very specific and should be posted in "right pew".
From few years of playing with Linux I see that rudimentary problems are covered in tutorials.
In this case there were plenty of replies as far as "you put this text in fstab". Where it got muddied was how to tie grub, blkid and others with fstab. That is no subject of tutorials.
Back in the day, it was useful to direct the newbie to the Linux Documentation Project. A recent visit shows that that site needs a lot of updating.

Quote:
At least they should if the are curious how "their software" is making Linux better or more "user" friendly.
Not all developers have the "right stuff" to write easily understood documentation. Projects ought to try and find good writers. I used to hang out with a couple of good writers on another (now defunct) Linux forum that seemd to attract a fair number of Linux newbies.

Quote:
I have not seen similar "show stopper" as when "fstab" has wrong options , but as I said before - this is something a user who just uses Linux to read e-mails would be not exposed to.
When I've had weird fstab problems, I found that: Setting the boot level to "3", commenting out most of fstab out -- except "/" -- and uncommenting one record at a time until the error returns.

Quote:
Besides - who really uses RAID when hard drives are much more reliable than 30 - 40 years ago?

Anybody who is paranoid , OK - cares about not loosing family pictures , uses "cloud" anyway.
Yeah, that paranoia things is what drives me. RAID for all my photos, ripped/downloaded music, email, documents, source code, etc., etc. And then rsyncing those to external disks nightly. No cloud. Too much data, not enough bandwidth.

Have a lot of fun...
 
Old 07-04-2019, 09:24 AM   #23
helen314
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Not all developers have the "right stuff" to write easily understood documentation
During days when I was "actively employed" to support my family one could always find a job as "tech writer".
Even good secretary would also fill in as "editor".

Since Al Gore send secretarial jobs same way as ice man job EVERYBODY is a tech writer!

Thanks for all the comments.

I still have several "test" devices occupying disk space in need to be deleted.
I need a secretary !
 
  


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