leaving unused space on SSD (to increase lifetime)?
I am reading that SSD need to have some "garbage collection".
For an SSD which would be the main device of a Linux desktop (the precise model I bought is Samsung SSD 970 EVO M2 - 2Tbytes), does it make sense to leave a small part of it unused?
I'm thinking of e.g. partitioning that SSD such that 2% of it remains in an empty Linux partitioning.
My dream is that by leaving some unused space, I might improve the life time of that SSD (because the firmware inside it would "rotate" that unused space). Does that make sense?
But I am not a hardware guy at all, so I could be very wrong.
This could be a related question (on "unix&linux").
linux partitioning ssd
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
add a comment |
I am reading that SSD need to have some "garbage collection".
For an SSD which would be the main device of a Linux desktop (the precise model I bought is Samsung SSD 970 EVO M2 - 2Tbytes), does it make sense to leave a small part of it unused?
I'm thinking of e.g. partitioning that SSD such that 2% of it remains in an empty Linux partitioning.
My dream is that by leaving some unused space, I might improve the life time of that SSD (because the firmware inside it would "rotate" that unused space). Does that make sense?
But I am not a hardware guy at all, so I could be very wrong.
This could be a related question (on "unix&linux").
linux partitioning ssd
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
Why the downvote?..
– Basile Starynkevitch
Jan 9 at 17:41
add a comment |
I am reading that SSD need to have some "garbage collection".
For an SSD which would be the main device of a Linux desktop (the precise model I bought is Samsung SSD 970 EVO M2 - 2Tbytes), does it make sense to leave a small part of it unused?
I'm thinking of e.g. partitioning that SSD such that 2% of it remains in an empty Linux partitioning.
My dream is that by leaving some unused space, I might improve the life time of that SSD (because the firmware inside it would "rotate" that unused space). Does that make sense?
But I am not a hardware guy at all, so I could be very wrong.
This could be a related question (on "unix&linux").
linux partitioning ssd
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
I am reading that SSD need to have some "garbage collection".
For an SSD which would be the main device of a Linux desktop (the precise model I bought is Samsung SSD 970 EVO M2 - 2Tbytes), does it make sense to leave a small part of it unused?
I'm thinking of e.g. partitioning that SSD such that 2% of it remains in an empty Linux partitioning.
My dream is that by leaving some unused space, I might improve the life time of that SSD (because the firmware inside it would "rotate" that unused space). Does that make sense?
But I am not a hardware guy at all, so I could be very wrong.
This could be a related question (on "unix&linux").
linux partitioning ssd
linux partitioning ssd
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
asked Jan 9 at 17:20
Basile StarynkevitchBasile Starynkevitch
982411
982411
Why the downvote?..
– Basile Starynkevitch
Jan 9 at 17:41
add a comment |
Why the downvote?..
– Basile Starynkevitch
Jan 9 at 17:41
Why the downvote?..
– Basile Starynkevitch
Jan 9 at 17:41
Why the downvote?..
– Basile Starynkevitch
Jan 9 at 17:41
add a comment |
1 Answer
1
active
oldest
votes
SSD use TRIM
to avoid too many write operations that will shorten its life expectancy.
However, as TRIM works on much larger blocks than are allocated by the operating
system for sectors, there can be a problem when TRIM requires empty space
for relocating sectors from partially-empty blocks.
For this reason, SSD manufacturers practice Over-Provisioning, which is extra
space that the SSD can use but the operating system cannot allocate.
The SSD firmware will also do Garbage Collection to compact used space
and free as much space as possible.
In spite of Over-Provisioning, it is counseled to leave more free space on the SSD.
The numbers mentioned vary between 10% to 25%, but there are absolutely no
studies that show an optimal number. In short, these numbers are only theoretical
guesses.
I would still think that 2% is a bit low, as 10% was the lowest that I ever saw
mentioned in the articles that I have encountered.
For more information I would recommend the article
The SSD Anthology: Understanding SSDs and New Drives from OCZ
and especially the section
"Putting Theory to Practice: Understanding the SSD Performance Degradation Problem".
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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oldest
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votes
SSD use TRIM
to avoid too many write operations that will shorten its life expectancy.
However, as TRIM works on much larger blocks than are allocated by the operating
system for sectors, there can be a problem when TRIM requires empty space
for relocating sectors from partially-empty blocks.
For this reason, SSD manufacturers practice Over-Provisioning, which is extra
space that the SSD can use but the operating system cannot allocate.
The SSD firmware will also do Garbage Collection to compact used space
and free as much space as possible.
In spite of Over-Provisioning, it is counseled to leave more free space on the SSD.
The numbers mentioned vary between 10% to 25%, but there are absolutely no
studies that show an optimal number. In short, these numbers are only theoretical
guesses.
I would still think that 2% is a bit low, as 10% was the lowest that I ever saw
mentioned in the articles that I have encountered.
For more information I would recommend the article
The SSD Anthology: Understanding SSDs and New Drives from OCZ
and especially the section
"Putting Theory to Practice: Understanding the SSD Performance Degradation Problem".
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
add a comment |
SSD use TRIM
to avoid too many write operations that will shorten its life expectancy.
However, as TRIM works on much larger blocks than are allocated by the operating
system for sectors, there can be a problem when TRIM requires empty space
for relocating sectors from partially-empty blocks.
For this reason, SSD manufacturers practice Over-Provisioning, which is extra
space that the SSD can use but the operating system cannot allocate.
The SSD firmware will also do Garbage Collection to compact used space
and free as much space as possible.
In spite of Over-Provisioning, it is counseled to leave more free space on the SSD.
The numbers mentioned vary between 10% to 25%, but there are absolutely no
studies that show an optimal number. In short, these numbers are only theoretical
guesses.
I would still think that 2% is a bit low, as 10% was the lowest that I ever saw
mentioned in the articles that I have encountered.
For more information I would recommend the article
The SSD Anthology: Understanding SSDs and New Drives from OCZ
and especially the section
"Putting Theory to Practice: Understanding the SSD Performance Degradation Problem".
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
add a comment |
SSD use TRIM
to avoid too many write operations that will shorten its life expectancy.
However, as TRIM works on much larger blocks than are allocated by the operating
system for sectors, there can be a problem when TRIM requires empty space
for relocating sectors from partially-empty blocks.
For this reason, SSD manufacturers practice Over-Provisioning, which is extra
space that the SSD can use but the operating system cannot allocate.
The SSD firmware will also do Garbage Collection to compact used space
and free as much space as possible.
In spite of Over-Provisioning, it is counseled to leave more free space on the SSD.
The numbers mentioned vary between 10% to 25%, but there are absolutely no
studies that show an optimal number. In short, these numbers are only theoretical
guesses.
I would still think that 2% is a bit low, as 10% was the lowest that I ever saw
mentioned in the articles that I have encountered.
For more information I would recommend the article
The SSD Anthology: Understanding SSDs and New Drives from OCZ
and especially the section
"Putting Theory to Practice: Understanding the SSD Performance Degradation Problem".
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
SSD use TRIM
to avoid too many write operations that will shorten its life expectancy.
However, as TRIM works on much larger blocks than are allocated by the operating
system for sectors, there can be a problem when TRIM requires empty space
for relocating sectors from partially-empty blocks.
For this reason, SSD manufacturers practice Over-Provisioning, which is extra
space that the SSD can use but the operating system cannot allocate.
The SSD firmware will also do Garbage Collection to compact used space
and free as much space as possible.
In spite of Over-Provisioning, it is counseled to leave more free space on the SSD.
The numbers mentioned vary between 10% to 25%, but there are absolutely no
studies that show an optimal number. In short, these numbers are only theoretical
guesses.
I would still think that 2% is a bit low, as 10% was the lowest that I ever saw
mentioned in the articles that I have encountered.
For more information I would recommend the article
The SSD Anthology: Understanding SSDs and New Drives from OCZ
and especially the section
"Putting Theory to Practice: Understanding the SSD Performance Degradation Problem".
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
answered Jan 9 at 20:00
harrymcharrymc
256k14268568
256k14268568
add a comment |
add a comment |
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Why the downvote?..
– Basile Starynkevitch
Jan 9 at 17:41