if you suddenly lose power there is a fair chance that the last few blocks of data had not made it to disk yet.
For the most part this only only a big issue with oracle db and/or mysql and/or stuff with critical transactions that cannot be lost and that need a consistent state when they come back up and flush writes and/or use direct io. For anything else the bit of data you lost is not so much an issue since whatever that was stopped working and did not finish. I run cameras and other stuff, and the 5-30 seconds I could lose because of this is minor compared to what I lost for being down for however long I was down for. On Thu, Mar 2, 2023 at 2:25 PM Ranjan Maitra <mlmai...@gmx.com> wrote: > > Thanks to everybody. I recall discussion from several years ago on the > benefits of software over hardware RAID. I had completely forgotten about UPS > for this new machine. Btw, what happens if power goes out (and I do not have > UPS)? > > Btw, I still stick to ext4, largely because of inertia (and because I have > used lvm in the past and hated its naming conventions, I think, but there > were also other limitations that I do not now recall) and have stayed away > from zfs or btrfs or lvm. I am not sure what to do now. Clearly, things have > moved far on. > > Thanks, > Ranjan > > On Thu Mar02'23 02:19:25PM, George N. White III wrote: > > From: "George N. White III" <gnw...@gmail.com> > > Date: Thu, 2 Mar 2023 14:19:25 -0400 > > To: Community support for Fedora users <users@lists.fedoraproject.org> > > Reply-To: Community support for Fedora users <users@lists.fedoraproject.org> > > Subject: Re: software or hardware raid? > > > > On Wed, Mar 1, 2023 at 4:02 PM Ranjan Maitra <mlmai...@gmx.com> wrote: > > > > > Hi, > > > > > > I would like to RAID two of my disks, and I was wondering if the > > > recommendation is to do software or hardware RAID? > > > > > > > Software RAID works very well on modern hardware. You do want to make sure > > a power > > outage can't cause a shutdown before the RAID is safely dismounted. > > Ideally a your site > > has a reliable generator and your server has a UPS that can hold power > > while waiting for > > the generator to come online and also long enough to ensure a clean > > shutdown when the > > generator fails. > > > > -- > > George N. White III > > > _______________________________________________ > > users mailing list -- users@lists.fedoraproject.org > > To unsubscribe send an email to users-le...@lists.fedoraproject.org > > Fedora Code of Conduct: > > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > > List Archives: > > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > > Do not reply to spam, report it: > > https://pagure.io/fedora-infrastructure/new_issue > _______________________________________________ > users mailing list -- users@lists.fedoraproject.org > To unsubscribe send an email to users-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > Do not reply to spam, report it: > https://pagure.io/fedora-infrastructure/new_issue _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
