On November 11, 2020 8:58:02 PM EST, H <agents at meddatainc.com> 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 >> 16k on the 2nd then 16k back on the first, repeat (replace 16k with >> whatever your raid stripe size is). >> >> if its a raid 1 mirror, then either disk by itself has the complete >file >> system on it, so you should be able to remirror the changed disk onto >the >> other drive. you MUST do that re-mirror because your two disks are >no >> longer identical, and reads will alternate between them, so some >reads will >> get new data and others will get old data, which will be highly >chaotic. >> >> >> >> On Wed, Nov 4, 2020 at 6:18 PM H <agents at meddatainc.com> wrote: >> >>> 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 >>> modifying the grub command line I am able to boot the system from >one of >>> the harddisks after entering the LUKS password, seemingly without >any >>> problems but am obviously not running in RAID0 mode. When I booted >in >>> single-disk mode I am sure there were some new files created on the >single >>> SSD the system sees but I fairly quickly shut it down until this can >be >>> fixed. >>> >>> >>> >>> My question is: once the operating system fix has been released and >I can >>> once again boot in BIOS RAID0 mode and decrypting both SSDs (same >password >>> entered only once of course), how will the BIOS RAID0 react? How >will it >>> handle new files on one disk, altered timestamps etc.? >>> >>> >>> Thanks. >>> >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> https://lists.centos.org/mailman/listinfo/centos >>> >> >How do I do the remirroring once the system is working again? I filed a >bug report on bugs.centos.org >(https://bugs.centos.org/view.php?id=17830#c37850) but I could use some >more assistance to take this further... > >It was suggested that "if no kernel boots any more, I am pretty sure >that your initial ramdisks were rebuild without including a kernel >module required by LUKS.you should rebuild them , forcing dracut to >include the missing driver. And in the process you might as well >upgrade to centos 7.9, kernel 3.10.0-1160.2.2.el7.x86_64 is already >available in the CR repository." > >Unfortunately I do not know how do the above... And I do not know which >drivers are missing that I need to include... > >If anyone would be able to tell me the specific steps I will attempt to >do the above. > >Thank you in advance. >_______________________________________________ >CentOS mailing list >CentOS at centos.org >https://lists.centos.org/mailman/listinfo/centos I should have corrected the previous info, it is RAID1, ie mirroring, not RAID0.