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

RAID60 question

2024-12-01 Thread Greg
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 (metadata ver. 1.0). 3. The strid