Do I need to enable TRIM in all OS if multibooting?
I multiboot. Does one OS issuing TRIM to my SSD cover all partitions or not?
I have a MacBook Pro (Core2Duo version 2.1 - late 2007) with the HDD replaced with a SSD. I am multi-booting it with Windows 10, Linux, Lion (the last supported OS X version) and El Capitan (the last OS X version that will work with Core2Duo).
All of these run on the same SSD.
I have enabled TRIM support for my SSD in Windows and OS X Lion but I'm not sure how to in the other OS. That isn't my question though.
My question is do I have to enable TRIM support in all OS or will one OS issuing the TRIM command work for the other OS on the same SSD?
That is does TRIM work for the SSD device or the individual OS?
linux windows macos ssd trim
asked Dec 2 at 17:55
lx07
1728
add a comment |
I multiboot. Does one OS issuing TRIM to my SSD cover all partitions or not?
I have a MacBook Pro (Core2Duo version 2.1 - late 2007) with the HDD replaced with a SSD. I am multi-booting it with Windows 10, Linux, Lion (the last supported OS X version) and El Capitan (the last OS X version that will work with Core2Duo).
All of these run on the same SSD.
I have enabled TRIM support for my SSD in Windows and OS X Lion but I'm not sure how to in the other OS. That isn't my question though.
My question is do I have to enable TRIM support in all OS or will one OS issuing the TRIM command work for the other OS on the same SSD?
That is does TRIM work for the SSD device or the individual OS?
linux windows macos ssd trim
asked Dec 2 at 17:55
lx07
1728
add a comment |
I multiboot. Does one OS issuing TRIM to my SSD cover all partitions or not?
I have a MacBook Pro (Core2Duo version 2.1 - late 2007) with the HDD replaced with a SSD. I am multi-booting it with Windows 10, Linux, Lion (the last supported OS X version) and El Capitan (the last OS X version that will work with Core2Duo).
All of these run on the same SSD.
I have enabled TRIM support for my SSD in Windows and OS X Lion but I'm not sure how to in the other OS. That isn't my question though.
My question is do I have to enable TRIM support in all OS or will one OS issuing the TRIM command work for the other OS on the same SSD?
That is does TRIM work for the SSD device or the individual OS?
linux windows macos ssd trim
asked Dec 2 at 17:55
lx07
1728
I multiboot. Does one OS issuing TRIM to my SSD cover all partitions or not?
I have a MacBook Pro (Core2Duo version 2.1 - late 2007) with the HDD replaced with a SSD. I am multi-booting it with Windows 10, Linux, Lion (the last supported OS X version) and El Capitan (the last OS X version that will work with Core2Duo).
All of these run on the same SSD.
I have enabled TRIM support for my SSD in Windows and OS X Lion but I'm not sure how to in the other OS. That isn't my question though.
My question is do I have to enable TRIM support in all OS or will one OS issuing the TRIM command work for the other OS on the same SSD?
That is does TRIM work for the SSD device or the individual OS?
linux windows macos ssd trim
linux windows macos ssd trim
asked Dec 2 at 17:55
lx07
1728
asked Dec 2 at 17:55
lx07
1728
asked Dec 2 at 17:55
lx07
1728
asked Dec 2 at 17:55
lx07
1728
asked Dec 2 at 17:55
lx07
1728
1728
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
does TRIM work for the SSD device or the individual OS?
Neither. It works for an individual mounted filesystem. Your drive is unable to tell by itself which data can be discarded because it knows nothing about filesystems nor other structures (like swap partitions), so it needs support from an OS that understands them.
If two of your OS-es access the same filesystem (not at the same time, of course) and the first one didn't trim, a trim command from the second one will do the job for the entire filesystem because it perceives the whole filesystem including whatever changes the first OS did.
As it's not advisable (nor sometimes possible) to mount the root partition of another OS, each OS should trim at least its own root partition and not rely on another OS to do this instead (even though in some cases it may be technically possible).
Also note you cannot trim a filesystem your (current) OS doesn't understand. A possible exception to this may be a utility that understands a filesystem foreign to the OS and can send trimming commands manually, despite the filesystem not even being mounted. You will probably never need such utility; your first choice should be to trim from an OS that understands a given filesystem natively.
will one OS issuing the TRIM command work for the other OS on the same SSD?
In general: no. Your drive doesn't care which OS trims what part, but, to trim right, an OS needs to tell apart relevant data from expendable; so it needs to understand the filesystem you want to trim. For this reason trimming from one OS in a multiboot setup like yours is not enough. A sane approach is to let each OS trim filesystems it uses exclusively. For filesystems "shared" between OS-es at least one OS should trim it on a regular basis.
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
add a comment |
The TRIM command is issued by disk driver, which is why you had to turn it on in
Windows and OS X.
Therefore this is a function of the OS, or more specifically of the disk driver,
which needs to support TRIM and use it to execute deletes.
As in Wikipedia Trim (computing):
A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.
answered Dec 2 at 18:17
harrymc
252k12259560
1
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
add a comment |
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2 Answers
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active
oldest
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2 Answers
2
active
oldest
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does TRIM work for the SSD device or the individual OS?
Neither. It works for an individual mounted filesystem. Your drive is unable to tell by itself which data can be discarded because it knows nothing about filesystems nor other structures (like swap partitions), so it needs support from an OS that understands them.
If two of your OS-es access the same filesystem (not at the same time, of course) and the first one didn't trim, a trim command from the second one will do the job for the entire filesystem because it perceives the whole filesystem including whatever changes the first OS did.
As it's not advisable (nor sometimes possible) to mount the root partition of another OS, each OS should trim at least its own root partition and not rely on another OS to do this instead (even though in some cases it may be technically possible).
Also note you cannot trim a filesystem your (current) OS doesn't understand. A possible exception to this may be a utility that understands a filesystem foreign to the OS and can send trimming commands manually, despite the filesystem not even being mounted. You will probably never need such utility; your first choice should be to trim from an OS that understands a given filesystem natively.
will one OS issuing the TRIM command work for the other OS on the same SSD?
In general: no. Your drive doesn't care which OS trims what part, but, to trim right, an OS needs to tell apart relevant data from expendable; so it needs to understand the filesystem you want to trim. For this reason trimming from one OS in a multiboot setup like yours is not enough. A sane approach is to let each OS trim filesystems it uses exclusively. For filesystems "shared" between OS-es at least one OS should trim it on a regular basis.
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
add a comment |
does TRIM work for the SSD device or the individual OS?
Neither. It works for an individual mounted filesystem. Your drive is unable to tell by itself which data can be discarded because it knows nothing about filesystems nor other structures (like swap partitions), so it needs support from an OS that understands them.
If two of your OS-es access the same filesystem (not at the same time, of course) and the first one didn't trim, a trim command from the second one will do the job for the entire filesystem because it perceives the whole filesystem including whatever changes the first OS did.
As it's not advisable (nor sometimes possible) to mount the root partition of another OS, each OS should trim at least its own root partition and not rely on another OS to do this instead (even though in some cases it may be technically possible).
Also note you cannot trim a filesystem your (current) OS doesn't understand. A possible exception to this may be a utility that understands a filesystem foreign to the OS and can send trimming commands manually, despite the filesystem not even being mounted. You will probably never need such utility; your first choice should be to trim from an OS that understands a given filesystem natively.
will one OS issuing the TRIM command work for the other OS on the same SSD?
In general: no. Your drive doesn't care which OS trims what part, but, to trim right, an OS needs to tell apart relevant data from expendable; so it needs to understand the filesystem you want to trim. For this reason trimming from one OS in a multiboot setup like yours is not enough. A sane approach is to let each OS trim filesystems it uses exclusively. For filesystems "shared" between OS-es at least one OS should trim it on a regular basis.
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
add a comment |
does TRIM work for the SSD device or the individual OS?
Neither. It works for an individual mounted filesystem. Your drive is unable to tell by itself which data can be discarded because it knows nothing about filesystems nor other structures (like swap partitions), so it needs support from an OS that understands them.
If two of your OS-es access the same filesystem (not at the same time, of course) and the first one didn't trim, a trim command from the second one will do the job for the entire filesystem because it perceives the whole filesystem including whatever changes the first OS did.
As it's not advisable (nor sometimes possible) to mount the root partition of another OS, each OS should trim at least its own root partition and not rely on another OS to do this instead (even though in some cases it may be technically possible).
Also note you cannot trim a filesystem your (current) OS doesn't understand. A possible exception to this may be a utility that understands a filesystem foreign to the OS and can send trimming commands manually, despite the filesystem not even being mounted. You will probably never need such utility; your first choice should be to trim from an OS that understands a given filesystem natively.
will one OS issuing the TRIM command work for the other OS on the same SSD?
In general: no. Your drive doesn't care which OS trims what part, but, to trim right, an OS needs to tell apart relevant data from expendable; so it needs to understand the filesystem you want to trim. For this reason trimming from one OS in a multiboot setup like yours is not enough. A sane approach is to let each OS trim filesystems it uses exclusively. For filesystems "shared" between OS-es at least one OS should trim it on a regular basis.
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
does TRIM work for the SSD device or the individual OS?
Neither. It works for an individual mounted filesystem. Your drive is unable to tell by itself which data can be discarded because it knows nothing about filesystems nor other structures (like swap partitions), so it needs support from an OS that understands them.
If two of your OS-es access the same filesystem (not at the same time, of course) and the first one didn't trim, a trim command from the second one will do the job for the entire filesystem because it perceives the whole filesystem including whatever changes the first OS did.
As it's not advisable (nor sometimes possible) to mount the root partition of another OS, each OS should trim at least its own root partition and not rely on another OS to do this instead (even though in some cases it may be technically possible).
Also note you cannot trim a filesystem your (current) OS doesn't understand. A possible exception to this may be a utility that understands a filesystem foreign to the OS and can send trimming commands manually, despite the filesystem not even being mounted. You will probably never need such utility; your first choice should be to trim from an OS that understands a given filesystem natively.
will one OS issuing the TRIM command work for the other OS on the same SSD?
In general: no. Your drive doesn't care which OS trims what part, but, to trim right, an OS needs to tell apart relevant data from expendable; so it needs to understand the filesystem you want to trim. For this reason trimming from one OS in a multiboot setup like yours is not enough. A sane approach is to let each OS trim filesystems it uses exclusively. For filesystems "shared" between OS-es at least one OS should trim it on a regular basis.
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
edited Dec 3 at 6:20
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
answered Dec 2 at 19:19
Kamil Maciorowski
23.6k155074
23.6k155074
add a comment |
add a comment |
The TRIM command is issued by disk driver, which is why you had to turn it on in
Windows and OS X.
Therefore this is a function of the OS, or more specifically of the disk driver,
which needs to support TRIM and use it to execute deletes.
As in Wikipedia Trim (computing):
A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.
answered Dec 2 at 18:17
harrymc
252k12259560
1
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
add a comment |
The TRIM command is issued by disk driver, which is why you had to turn it on in
Windows and OS X.
Therefore this is a function of the OS, or more specifically of the disk driver,
which needs to support TRIM and use it to execute deletes.
As in Wikipedia Trim (computing):
A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.
answered Dec 2 at 18:17
harrymc
252k12259560
1
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
add a comment |
The TRIM command is issued by disk driver, which is why you had to turn it on in
Windows and OS X.
Therefore this is a function of the OS, or more specifically of the disk driver,
which needs to support TRIM and use it to execute deletes.
As in Wikipedia Trim (computing):
A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.
answered Dec 2 at 18:17
harrymc
252k12259560
The TRIM command is issued by disk driver, which is why you had to turn it on in
Windows and OS X.
Therefore this is a function of the OS, or more specifically of the disk driver,
which needs to support TRIM and use it to execute deletes.
As in Wikipedia Trim (computing):
A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.
answered Dec 2 at 18:17
harrymc
252k12259560
answered Dec 2 at 18:17
harrymc
252k12259560
answered Dec 2 at 18:17
harrymc
252k12259560
answered Dec 2 at 18:17
harrymc
252k12259560
252k12259560
1
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
add a comment |
1
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
1
1
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
I know it is issued by an OS - that is the question - I have done it twice. I also know what TRIM is or I would not have asked. This doesn't answer the question at all so downvoted for ignoring my question.
– lx07
Dec 2 at 19:07
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
There is no other answer, or your question doesn't make sense. What does it mean "work for the SSD device or the individual OS" - of course it works by the OS on the SSD via its firmware. So what else?
– harrymc
Dec 2 at 19:09
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Sure there is. "Do all OS need to enable TRIM in a multiboot scenario? "YES" or "NO"
– lx07
Dec 2 at 19:11
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
Neither: The OS enables nothing. It only permits its driver to use the TRIM command, the driver that is part of the OS. This is enabled by default, but the disabling part is just in case the TRIM support of the SSD is faulty, a transitional measure that will surely disappear in a few years. The disk firmware is always capable of receiving TRIM commands, if issued, and doesn't need enabling, nor does it care which OS issued the commands.
– harrymc
Dec 2 at 20:58
add a comment |
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