Have an SSD and HDD as the same filesystem and overflow from one to the other?

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Is it possible in Linux (specifically OpenSUSE) to have an SSD and a HDD set up in such a way that they appear as a single filesystem, yet data is always written to the SSD until full, and then "overflow" to the HDD?




filesystems disk block-device device-mapper




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    bcache.evilpiepirate.org might be the sort of thing to look into
    – Mat
    Feb 9 at 16:23














up vote
0
down vote

favorite












Is it possible in Linux (specifically OpenSUSE) to have an SSD and a HDD set up in such a way that they appear as a single filesystem, yet data is always written to the SSD until full, and then "overflow" to the HDD?




filesystems disk block-device device-mapper




share|improve this question
















  • 2




    bcache.evilpiepirate.org might be the sort of thing to look into
    – Mat
    Feb 9 at 16:23












up vote
0
down vote

favorite









up vote
0
down vote

favorite











Is it possible in Linux (specifically OpenSUSE) to have an SSD and a HDD set up in such a way that they appear as a single filesystem, yet data is always written to the SSD until full, and then "overflow" to the HDD?




filesystems disk block-device device-mapper




share|improve this question












Is it possible in Linux (specifically OpenSUSE) to have an SSD and a HDD set up in such a way that they appear as a single filesystem, yet data is always written to the SSD until full, and then "overflow" to the HDD?





filesystems disk block-device device-mapper





share|improve this question











share|improve this question




share|improve this question










asked Feb 9 at 15:58









Owen Pauling

687




687







  • 2




    bcache.evilpiepirate.org might be the sort of thing to look into
    – Mat
    Feb 9 at 16:23












  • 2




    bcache.evilpiepirate.org might be the sort of thing to look into
    – Mat
    Feb 9 at 16:23







2




2




bcache.evilpiepirate.org might be the sort of thing to look into
– Mat
Feb 9 at 16:23




bcache.evilpiepirate.org might be the sort of thing to look into
– Mat
Feb 9 at 16:23










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Setting up RAID in Linear Mode should achieve what you are looking for. You can find more information here






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  • 1




    That would not guarantee that the SSD portion is written first.
    – dhag
    Feb 9 at 16:16






  • 1




    the wiki entry seems to suggest that there is an order to the disk writes.
    – imbuedHope
    Feb 9 at 16:36










  • You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
    – dhag
    Feb 9 at 16:40










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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
1
down vote













Setting up RAID in Linear Mode should achieve what you are looking for. You can find more information here






share|improve this answer
















  • 1




    That would not guarantee that the SSD portion is written first.
    – dhag
    Feb 9 at 16:16






  • 1




    the wiki entry seems to suggest that there is an order to the disk writes.
    – imbuedHope
    Feb 9 at 16:36










  • You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
    – dhag
    Feb 9 at 16:40














up vote
1
down vote













Setting up RAID in Linear Mode should achieve what you are looking for. You can find more information here






share|improve this answer
















  • 1




    That would not guarantee that the SSD portion is written first.
    – dhag
    Feb 9 at 16:16






  • 1




    the wiki entry seems to suggest that there is an order to the disk writes.
    – imbuedHope
    Feb 9 at 16:36










  • You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
    – dhag
    Feb 9 at 16:40












up vote
1
down vote










up vote
1
down vote









Setting up RAID in Linear Mode should achieve what you are looking for. You can find more information here






share|improve this answer












Setting up RAID in Linear Mode should achieve what you are looking for. You can find more information here







share|improve this answer












share|improve this answer



share|improve this answer










answered Feb 9 at 16:01









imbuedHope

1968




1968







  • 1




    That would not guarantee that the SSD portion is written first.
    – dhag
    Feb 9 at 16:16






  • 1




    the wiki entry seems to suggest that there is an order to the disk writes.
    – imbuedHope
    Feb 9 at 16:36










  • You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
    – dhag
    Feb 9 at 16:40












  • 1




    That would not guarantee that the SSD portion is written first.
    – dhag
    Feb 9 at 16:16






  • 1




    the wiki entry seems to suggest that there is an order to the disk writes.
    – imbuedHope
    Feb 9 at 16:36










  • You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
    – dhag
    Feb 9 at 16:40







1




1




That would not guarantee that the SSD portion is written first.
– dhag
Feb 9 at 16:16




That would not guarantee that the SSD portion is written first.
– dhag
Feb 9 at 16:16




1




1




the wiki entry seems to suggest that there is an order to the disk writes.
– imbuedHope
Feb 9 at 16:36




the wiki entry seems to suggest that there is an order to the disk writes.
– imbuedHope
Feb 9 at 16:36












You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
– dhag
Feb 9 at 16:40




You are right; the first disk in the RAID array will have the lowest block addresses (or something to that effect). However, the filesystem that will be on top of the array is unlikely to guarantee that files are then written in increasing address order. I also suspect that the asker wants a more complex scheme than what they asked.
– dhag
Feb 9 at 16:40












 

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