Re: [CentOS] BIOS RAID0 and differences between disks

2020-11-11 Thread H
On November 11, 2020 8:58:02 PM EST, H wrote: >On 11/04/2020 10:21 PM, John Pierce wrote: >> is it RAID 0 (striped) or raid1 (mirrored) ?? >> >> if you wrote on half of a raid0 stripe set, you basically trashed it. >> blocks are striped across both drives, so like 16k on the first disk, >then >> 1

Re: [CentOS] BIOS RAID0 and differences between disks

2020-11-11 Thread H
On 11/04/2020 10:21 PM, John Pierce wrote: > is it RAID 0 (striped) or raid1 (mirrored) ?? > > if you wrote on half of a raid0 stripe set, you basically trashed it. > blocks are striped across both drives, so like 16k on the first disk, then > 16k on the 2nd then 16k back on the first, repeat (repl

Re: [CentOS] BIOS RAID0 and differences between disks

2020-11-05 Thread H
On 11/04/2020 10:47 PM, Valeri Galtsev wrote: > >> On Nov 4, 2020, at 9:21 PM, John Pierce wrote: >> >> is it RAID 0 (striped) or raid1 (mirrored) ?? >> >> if you wrote on half of a raid0 stripe set, you basically trashed it. >> blocks are striped across both drives, so like 16k on the first disk,

Re: [CentOS] BIOS RAID0 and differences between disks

2020-11-04 Thread Valeri Galtsev
> On Nov 4, 2020, at 9:21 PM, John Pierce wrote: > > is it RAID 0 (striped) or raid1 (mirrored) ?? > > if you wrote on half of a raid0 stripe set, you basically trashed it. > blocks are striped across both drives, so like 16k on the first disk, then > 16k on the 2nd then 16k back on the first,

Re: [CentOS] BIOS RAID0 and differences between disks

2020-11-04 Thread John Pierce
is it RAID 0 (striped) or raid1 (mirrored) ?? if you wrote on half of a raid0 stripe set, you basically trashed it. blocks are striped across both drives, so like 16k on the first disk, then 16k on the 2nd then 16k back on the first, repeat (replace 16k with whatever your raid stripe size is). if

[CentOS] BIOS RAID0 and differences between disks

2020-11-04 Thread H
My computer running CentOS 7 is configured to use BIOS RAID0 and has two identical SSDs which are also encrypted. I had a crash the other day and due to a bug in the operating system update, I am unable to boot the system in RAID mode since dracut does not recognize the disks in grub. After modi