Re: RAID60 question

2024-12-02 Thread David Christensen
On 12/2/24 00:02, Jeffrey Walton wrote: On Sun, Dec 1, 2024 at 3:47 PM David Christensen wrote: On 12/1/24 04:27, Greg wrote: Hi there, I'm setting up MD-RAID0 on a top of HW-RAID6 devices (long story). I would like to confirm the following: 1. The RAID0 chunk size should be the stripe widt

Re: RAID60 question

2024-12-02 Thread Jeffrey Walton
On Sun, Dec 1, 2024 at 3:47 PM David Christensen wrote: > > On 12/1/24 04:27, Greg wrote: > > Hi there, > > > > I'm setting up MD-RAID0 on a top of HW-RAID6 devices (long story). I > > would like to confirm the following: > > > > 1. The RAID0 chunk size should be the stripe width of the > > underl

Re: RAID60 question

2024-12-01 Thread Michael Paoli
If you're not fully sure of any of those parameters, I'd suggest ... do some testing. E.g. if your target storage is quite large, maybe do only 2% of that, or possibly less - in total (approximate) size, but using the presumed or being tested stripe/cluster/etc. sizes. And test the performance, a

Re: RAID60 question

2024-12-01 Thread Greg
On 12/1/24 19:19, David Christensen wrote: On 12/1/24 04:27, Greg wrote: Hi there, I'm setting up MD-RAID0 on a top of HW-RAID6 devices (long story). I would like to confirm the following: 1. The RAID0 chunk size should be the stripe width of the underlying RAID6 volumes. 2. The RAID0 metad

Re: RAID60 question

2024-12-01 Thread David Christensen
On 12/1/24 04:27, Greg wrote: Hi there, I'm setting up MD-RAID0 on a top of HW-RAID6 devices (long story). I would like to confirm the following: 1. The RAID0 chunk size should be the stripe width of the underlying RAID6 volumes. 2. The RAID0 metadata should be at the end of the device (meta