argfa Posted April 10, 2017 Share #1 Posted April 10, 2017 Good morning, do you know if exist some script That replicate the SHR algorithm for debian installation? Thank you Fabio Quote Link to comment Share on other sites More sharing options...
agent47SG1 Posted April 10, 2017 Share #2 Posted April 10, 2017 Hello, SHR is only when you have disks with different size Ex: 2*2TB+2*1Tb SHR 4Tb usable / 2Tb parity RAID5 3Tb usable / 1Tb parity / 2Tb losed So if you have disks with same size you can use raid software like mdadm Quote Link to comment Share on other sites More sharing options...
argfa Posted April 10, 2017 Author Share #3 Posted April 10, 2017 Yes I know, but I Have 8 disks 2 x 1 TB 4 x 500 GB 1 x 320 GB 1 x 250 GB I know that mdadm can create a volume restricted at 250 GB (lower disks) with the waste of remaining spaces... Teorically, with SHR, final volume could be about 3510 GB Quote Link to comment Share on other sites More sharing options...
Benoire Posted April 10, 2017 Share #4 Posted April 10, 2017 SHR-1 is simply a mix of raid 5 partitions and raid 1 partitions depending on how you split the space up. You can manually calculate a hybrid raid, create the partitions and then do lots of md superblocks to create the various raid levels... This is all hard coded in to DSM as far as I can tell and is not a script. SHR2 is simply except uses Raid 6 and probably dual mirrors at raid 1 level. Quote Link to comment Share on other sites More sharing options...
colrojo Posted April 11, 2017 Share #5 Posted April 11, 2017 If you make : 1 raid 0 whith 2x500 . Call b 1 raid 0 whith 2x500. Call c 1 raid 5 whith b c And the 2x1tb You can 3 tb in raid 5 -> shr 1 If Split the 1tb disk in 2 of 500gb And make a raid0 whith 320&250 You can make 9 disk raid5 4tb. Same shr All of this os posible whith mdadm but ... You almost Lost the disk protection. Y think not is a most secure raid. Enviado desde mi Aquaris X5 Plus mediante Tapatalk Quote Link to comment Share on other sites More sharing options...
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