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BootDevice Not Found - acer aspire s7

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I've tried but the partition is locked...

As you can see on the pic below, i didn't succeed to find the solution :

It seems to be locked with /dev/md126

For the rest, i've understood your instructions @Serban but unable to go further than the first step

Şerban S.:
Thanks, Steve!

--- Quote from: stevef on April 16, 2024, 01:21:58 AM ---[...] If you don't want (or need) the system to operate RAID, it may be worth entering the UEFI/BIOS set up again to investigate changing the SATA mode from RAID to AHCI.
This might make things easier.

--- End quote ---

RAID setup: Do we really need it?

I was kinda reluctant to ask this question, but it popped up when I saw your reply regarding the RAID setup.
It so happens that my Dell Precision provides this kind of building the storage environment.
At first glance, it's quite interesting. Yet, one has to question himself a simple question:
What is the cost / outcome factor?
From my perspective, the home environment, is the last place where RAID might help.
There are a lot of things you need to know, in order to understand how deep it goes.
First, it's extremely difficult to figure out a way to use RAID with less than two devices. Further more, they have to be identical.
Besides that, what you get, might be security for data, but for a 2 x 250 GB you get a 250 GB RAID storage.
Maybe that looks still interesting, but the overall lifespan of the media, is lifespan/4. I can get into details, but basically, the technique used is mirroring the device 1 onto device 2.
While in a common setup we have one drive that works, here we have two, thus the wear-off of each drive is doubled (cost, two devices work as one).
There is another factor that increases the TCO (Total Cost of Ownership): Temperature.
While in a common setup the heat is spread around the drive and usually a desktop case handles that acceptably, when two drives are stacked, the heat increases.
That shortens a lot of the lifespan of the media, regardless the type. I learned that the hard way: losing drives.
In Romānia, a temperature of 35 Celsius, is pretty common during spring/summer. Sometimes, even in the autumn.
Sadly, this goes further than that: the last 4 years or maybe more, temperature topped over 40 Celsius. Sometimes, 43 Celsius.
What that means is: lifespan decreases from 100% up to 500% and even worse, due to high temperature. I collected data from my own storage from 2007 till now.
Some drives died after 2,000 hours, some others are still functional and they have gathered over 43,000 hours of service.
Another caveat of a home RAID setup, is power failure.
For a RAID  setup, this might be deadly. Both drives might get damaged so you need an UPS, without question.
Now, doing the simple math, I doubt that a home setup has a real need for such a complication as RAID.
Assuming there are >>1,000 GB of high value data in the archive and on the current drive, I still go for HDD mass storage & low-level backup (CloneZilla). It's about 10x cheaper than any SSD, and the range is pretty generous.
Nowadays, a 4TB external WD goes to 110 - 115 euro. A 4 TB SSD, starts from 250 euro (cheap!) and goes at some 400 euro.
Although I have a little experience with SSD drives (about 8 years), it looks that they are very sensitive and low tolerant to overheating.
What that means is that while a HDD lasts say 20,000 hours, a SSD goes at about 10,000 - 15,000 hours.
While for a HDD 20,000 hours is quite unusual, because the usual value is >30,000, for a SSD. 30,000 hours, is just a dream.
Let alone, over 40,000 hours.
Now, doing again the math, the overall costs of the SSD media, goes at about 4x than HDD media.

I belive that everybody in this community should read this, and understand, in order to save time, personal data and money.
Since many members here came because they want to throw another breath of life into their 2010 - 2015 ol'gran'pa, I belive this data I presented, worth reading and maybe more: applying.

I hope that this post will help the many nice people here, to make an educated decision regarding storage and data backup solutions.

Best regards!


--- Quote from: tsu02 on April 15, 2024, 05:41:33 PM ---Hi guys

About the disks number, here are the informations in the BIOS :

HDD0 Model Name : LITEONIT CMT-128L3M
HDD0 Serial Number : 002242101572A
HDD1 Model Name : LITEONIT CMT-128L3M
HDD1 Serial Number : 002242101572B

And under Main :

SATA Mode       [RAID Mode]

--- End quote ---

Thank you.
Without having the same hardware, it is difficult to advise specific steps.
Trying to use the regular GRUB/Ubuntu boot set up might be difficult with hardware RAID.

If you don't want (or need) the system to operate RAID, it may be worth entering the UEFI/BIOS set up again to investigate changing the SATA mode from RAID to AHCI.
This might make things easier.

Şerban S.:

--- Quote from: tsu02 on April 15, 2024, 05:49:46 PM ---And about GPartEd, the screenshots just below :

I hope it's helpful

Thanks again for your time

--- End quote ---

First two screenshots, show you the real physical drives. Since they are in RAID mode, they are unusable. "Busy", so to speak.
The next two drives, are logical, since this is the way RAID works.
Now, you need to create a partition table. You can use GPT, since the machine is with UEFI firmware.
After creating the Partition  table, you can create at least a FAT32 partition of 512 MB and an ext4 partition.
After creating the /dev/sdb1, change its type flag to "boot, esp".
After that, you should be able to install Linux Lite on the newly created partition (/dev/sdb2).
Before pressing the "Install now" button, be sure to check the place where the boot loader will be installed.
The name has to be the same as in GPartEd screenshots. In this example, should be  /dev/sdb1, since this is where GRUB has to go.
You should see something like:
/dev/sdb1, FAT32, 512 MB
/dev/sdb2 ext4 , 128 GB (or so)
After installing Linux on /dev/sdb, you may partition the other logical drive (/dev/sdc) from within Linux Lite.
Use the default install scenario and see if it finishes the install.
It will erase the partition /dev/sdb2 and create all things needed, including the SWAP.

Good luck!

Şerban S.:
I never used RAID, but as far as I know, they appear as logical disks (partitions).
As for the confusion, let's see the screenshots of GPartEd.

--- Quote from: stevef on April 15, 2024, 04:53:22 PM ---If there are two disks in the S7 running RAID, it may be confusing things.

--- End quote ---

I never saw in more than 25 years of using it, a GParted screen showing a list of DRIVES.
What it shows, is the partitions (logical disks) of a specific drive. If the drive is physical or logical, that is a different thing.
I find it irrelevant at this point if the drive is used with LVM or as usual. It's the same thing as in the extended type of partition.
This is why I need the screenshots of GPartEd.

Best regards!


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