Am I the only one who instantly thought about ZFS? " 'With the first link, the chain is forged. The first speech censured, the first thought forbidden, the first freedom denied, chains us all irrevocably.' Those words were uttered by Judge Aaron Satie as wisdom and warning... The first time any man's freedom is trodden on, we’re all damaged." - Jean-Luc Picard, quoting Judge Aaron Satie, Star Trek: TNG episode "The Drumhead" - Alex Smith - Kent, Washington (metropolitan Seattle area)
On Thu, Jun 14, 2018 at 3:45 PM, Chris McQuistion < [email protected]> wrote: > Always a good point. There is NO REPLACEMENT for proper backups! > > *Chris McQuistion* > > Director of Information Technology > > Currey Ingram Academy > > 6544 Murray Lane, Brentwood, TN, 37027 > <https://maps.google.com/?q=6544+Murray+Lane,+Brentwood,+TN,+37027&entry=gmail&source=g> > > > *o* 615.507.3175 *c* 615.525.5877 > > www.curreyingram.org > > > > > > > On Thu, Jun 14, 2018 at 9:14 AM Tilghman Lesher <[email protected]> > wrote: > >> All of that is moot if you're keeping offline backups (and maybe even >> offsite backups? Right? Right?), as the backup ensures that even if the >> original system becomes completely unavailable, you still have your >> applications and data. >> >> On Thu, Jun 14, 2018 at 1:37 AM, Csaba Toth <[email protected]> >> wrote: >> >>> My definition of the vendor lock-in is the same. Controller failure is >>> much less common than than disk failure, but when it happens it can be bad. >>> In such case moving off the data may not be easy, the controller knew how >>> it calculated and stored the parity. It's not a rocket science and it can >>> be forensically determined I guess, but that may require non trivial >>> effort. I've heard of a PACS system where the controller failure was >>> forgotten out of the contract (between the hospital and the vendor), but it >>> happened and it was NOT pretty. >>> >>> With LVM it's all software, so you don't even have to move the data off, >>> if you find any controller with JBOD capability which can show the disks >>> again to the system. >>> >>> I also often come across systems which 10+ years old, still running >>> fine, but the controllers become my first thought in my mind. The best if >>> you have some spare one. Still SATA, but yes, PATA for example is getting >>> really outdated. >>> >>> >>> On Mon, Jun 11, 2018, 9:46 AM Tilghman Lesher <[email protected]> >>> wrote: >>> >>>> When I think of vendor lock-in, I generally think of the inability to >>>> move data off of one system. I don't think that's really much of a >>>> concern, at least if you're working with business systems, and your >>>> hardware is not more than a few years old. As the disks tend to fail more >>>> often than the controller, how you formatted and managed the disks isn't >>>> likely to be the main issue. >>>> >>>> The bigger issue that you're going to encounter is a change in hardware >>>> specification. Imagine that you have a storage room full of IDE disks, and >>>> you needed to get information off of them, when today, the prevailing >>>> standard is SATA. Or, if you're into tape backups, imagine a room full of >>>> backup tapes and being unable to find a working drive that takes that >>>> specific tape. >>>> >>>> On Sat, Jun 9, 2018 at 12:54 AM, Csaba Toth <[email protected]> >>>> wrote: >>>> >>>>> True. LVM is not remotely equivalent, but can be utilized towards use >>>>> cases of disk arrays. A well versed RAID controller makes it easy to set >>>>> up >>>>> a RAID 50 for example but as you experienced, they can age and things can >>>>> go wrong. Some of them are true hardware RAID, like lats time I dealt with >>>>> an AMCC which has PowerPC CPU on board to perform the parity computations >>>>> and related stuff. But for today's CPUs that's not much. If you have >>>>> enough >>>>> spare cards that can be enough fine. >>>>> One thing I also learned long time ago: make sure to have a BBU and >>>>> that the BBU battery is charged & functional, otherwise you can be >>>>> impacted >>>>> by a significant speed hit because the card won't cache as much / caches >>>>> differently for data integrity reasons. >>>>> >>>>> On Fri, Jun 8, 2018 at 6:53 PM, Chris McQuistion < >>>>> [email protected]> wrote: >>>>> >>>>>> I don’t think of Linux software RAID as the same as LVM but yes I >>>>>> would prefer Linux software RAID over hardware RAID because the >>>>>> performance >>>>>> is very good and the array is portable. I had a hardware RAID card die on >>>>>> me, many years ago, and it made me realize that I was dependent on that >>>>>> single piece of hardware that the manufacturer (Adaptec) had long since >>>>>> discontinued. >>>>>> >>>>>> Sent from my iPhone >>>>>> >>>>>> On Jun 8, 2018, at 7:54 PM, Csaba Toth <[email protected]> >>>>>> wrote: >>>>>> >>>>>> Would you favor LVM over "hardware" (quote is half intentional)? My >>>>>> twin brother's advice is that this way I can avoid vendor lock-in. And if >>>>>> something goes south I can still migrate to anything which provides JBOD. >>>>>> >>>>>> >>>>>> >>>>>> On Fri, Jun 8, 2018 at 8:00 AM, Chris McQuistion <chris.mcquistion@ >>>>>> curreyingram.org> wrote: >>>>>> >>>>>>> and if you "watch cat /proc/mdstat", you can watch the progress as >>>>>>> your RAID array is built or re-built. >>>>>>> >>>>>>> *Chris McQuistion* >>>>>>> >>>>>>> Director of Information Technology >>>>>>> >>>>>>> Currey Ingram Academy >>>>>>> >>>>>>> 6544 Murray Lane, Brentwood, TN, 37027 >>>>>>> <https://maps.google.com/?q=6544+Murray+Lane,+Brentwood,+TN,+37027&entry=gmail&source=g> >>>>>>> >>>>>>> >>>>>>> *o* 615.507.3175 *c* 615.525.5877 >>>>>>> >>>>>>> www.curreyingram.org >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Fri, Jun 8, 2018 at 9:58 AM Howard White <[email protected]> wrote: >>>>>>> >>>>>>>> Currently messing about with a software raid (md). Found a nice >>>>>>>> how-to >>>>>>>> >>>>>>>> <https://www.digitalocean.com/community/tutorials/how-to- >>>>>>>> create-raid-arrays-with-mdadm-on-ubuntu-16-04> >>>>>>>> >>>>>>>> that included a couple of generally useful commands: >>>>>>>> >>>>>>>> lsblk -o NAME,SIZE,FSTYPE,MOUNTPOINT >>>>>>>> >>>>>>>> and >>>>>>>> >>>>>>>> cat /prod/mdstat >>>>>>>> >>>>>>>> >>>>>>>> Enjoy. >>>>>>>> >>>>>>>> Howard >>>>>>>> >>>>>>>> -- >>>>>>>> -- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "NLUG" group. >>>>>>>> To post to this group, send email to [email protected] >>>>>>>> To unsubscribe from this group, send email to >>>>>>>> [email protected] >>>>>>>> For more options, visit this group at http://groups.google.com/ >>>>>>>> group/nlug-talk?hl=en >>>>>>>> >>>>>>>> --- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "NLUG" group. >>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>> send an email to [email protected]. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> -- >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "NLUG" group. >>>>>>> To post to this group, send email to [email protected] >>>>>>> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >>>>>>> googlegroups.com >>>>>>> For more options, visit this group at http://groups.google.com/ >>>>>>> group/nlug-talk?hl=en >>>>>>> >>>>>>> --- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "NLUG" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to [email protected]. >>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>> >>>>>> >>>>>> -- >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "NLUG" group. >>>>>> To post to this group, send email to [email protected] >>>>>> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >>>>>> googlegroups.com >>>>>> For more options, visit this group at http://groups.google.com/ >>>>>> group/nlug-talk?hl=en >>>>>> >>>>>> --- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "NLUG" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to [email protected]. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>>> -- >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "NLUG" group. >>>>>> To post to this group, send email to [email protected] >>>>>> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >>>>>> googlegroups.com >>>>>> For more options, visit this group at http://groups.google.com/ >>>>>> group/nlug-talk?hl=en >>>>>> >>>>>> --- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "NLUG" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to [email protected]. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> -- >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "NLUG" group. >>>>> To post to this group, send email to [email protected] >>>>> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >>>>> googlegroups.com >>>>> For more options, visit this group at http://groups.google.com/ >>>>> group/nlug-talk?hl=en >>>>> >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "NLUG" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> >>>> >>>> -- >>>> Tilghman >>>> >>>> -- >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "NLUG" group. >>>> To post to this group, send email to [email protected] >>>> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >>>> googlegroups.com >>>> For more options, visit this group at http://groups.google.com/ >>>> group/nlug-talk?hl=en >>>> >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "NLUG" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "NLUG" group. >>> To post to this group, send email to [email protected] >>> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >>> googlegroups.com >>> For more options, visit this group at http://groups.google.com/ >>> group/nlug-talk?hl=en >>> >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "NLUG" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Tilghman >> >> -- >> -- >> You received this message because you are subscribed to the Google Groups >> "NLUG" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to nlug-talk+unsubscribe@ >> googlegroups.com >> For more options, visit this group at http://groups.google.com/ >> group/nlug-talk?hl=en >> >> --- >> You received this message because you are subscribed to the Google Groups >> "NLUG" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > -- > -- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to nlug-talk+unsubscribe@ > googlegroups.com > For more options, visit this group at http://groups.google.com/ > group/nlug-talk?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
