LM Going Super Slow

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all_spice
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Re: LM Going Super Slow

Post by all_spice » Thu May 24, 2018 12:16 am

michael louwe wrote:
Wed May 23, 2018 6:48 pm
@ all_spice, .......
all_spice wrote:.
.
https://www.linkedin.com/pulse/whats-di ... ive-tiwari (What’s the Difference Between GPT and MBR When Partitioning a Drive?)
http://www.overclock.net/forum/355-ssd/ ... n-mbr.html (How to create a 4TB partition in MBR?)
https://community.wd.com/t/4tb-on-mbr-a ... t/208765/5

Converting the disk from ms-dos/MBR to GPT will wipe out all data on it.

Seems, Win 7 cannot be installed on a GPT disk of a Legacy BIOS computer, ie only on a ms-dos/MBR disk of a Legacy BIOS computer.
So dual booting Linux and Win7 can't work on my old computer?

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michael louwe
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Re: LM Going Super Slow

Post by michael louwe » Thu May 24, 2018 12:25 am

@ all_spice, .......
all_spice wrote:.
.
You can dual-boot Win 7 and LM on ms-dos/MBR disks and a Legacy BIOS computer, ie not on GPT disks.
....... GPT disks are usually used with modern post-2012 OEM UEFI computers.

ms-dos/MBR disks are limited to 2TB in size, ie the 3TB external USB hard-drive may not be usable or become unusable.

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Re: LM Going Super Slow

Post by Spearmint2 » Thu May 24, 2018 12:41 am

There may be a way around that limitation, but involves using GParted to set up the disk. You can use MBR in Linux with larger cluster size of 4096 instead of the standard 512 extending the MBR limit to 16 TB size drives, and I suspect windows might then work on it too.

https://superuser.com/questions/852475/ ... b-capacity

https://en.wikipedia.org/wiki/Master_boot_record

For disks that present a sector size other than 512 bytes, such as USB external drives, there are limitations as well. A sector size of 4096 results in an eight-fold increase in the size of a partition that can be defined using MBR, allowing partitions up to 16 TiB (232 × 4096 bytes) in size. Versions of Windows more recent than Windows XP support the larger sector sizes, as well as Mac OS X, and Linux has supported larger sector sizes since 2.6.31 or 2.6.32
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all_spice
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Re: LM Going Super Slow

Post by all_spice » Thu May 24, 2018 11:07 am

Spearmint2 wrote:
Thu May 24, 2018 12:41 am
There may be a way around that limitation, but involves using GParted to set up the disk. You can use MBR in Linux with larger cluster size of 4096 instead of the standard 512 extending the MBR limit to 16 TB size drives, and I suspect windows might then work on it too.

https://superuser.com/questions/852475/ ... b-capacity

https://en.wikipedia.org/wiki/Master_boot_record

For disks that present a sector size other than 512 bytes, such as USB external drives, there are limitations as well. A sector size of 4096 results in an eight-fold increase in the size of a partition that can be defined using MBR, allowing partitions up to 16 TiB (232 × 4096 bytes) in size. Versions of Windows more recent than Windows XP support the larger sector sizes, as well as Mac OS X, and Linux has supported larger sector sizes since 2.6.31 or 2.6.32
I thought 4096 was standard cluster size? My one HDD is defaulted at that. Curious though, my other only allows cluster sizes of 32 and 64. I did not even know you could go that low. I did buy it super cheap a few years ago. Probably an ancient model. Probably running up my per bill too. Thing sounds like a jet engine...

OK. So I THINK I fixed it. After searching thousands of web pages, fruitlessly, trying line after line of code, probably making things worse, getting even more confused trying to decipher the kind advice here, I modified something, I probably should not have.

My 3TB external was somehow flagged as "Boot". I did not think that was right, so I unflagged it. After a restart, both drives are working perfectly fine, the Linux is lightening fast, I can see thumbnails and file sizes, and my CPU is at 57c, which is normal for an old i3.

So... Did I really fix it? Or was it just coincidence?

I am still confused about the whole Linux can't use a 3TB HDD on an old computer thing... Anyway, it is working now like it was.

Oh, but now the restart function is gone! I have to completely shutdown and then reboot.

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Spearmint2
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Re: LM Going Super Slow

Post by Spearmint2 » Thu May 24, 2018 4:16 pm

sorry, I typed cluster when I meant block.

https://unix.stackexchange.com/question ... uster-size
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Re: LM Going Super Slow

Post by jimallyn » Fri May 25, 2018 12:09 am

You keep saying things like "Linux can't ... " In fact, Linux can do just about anything you want it to do. Just because you don't yet know how to do it, that does not mean that it can't be done. For example, I have done a dual boot with LInux Mint and Win7 on several computers that are years older than yours.
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