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...e a PCIe SSD for the boot drive if I can find onecompatible with my old hardware. 1- Better to go with a hardware RAID (mainboardsupported) or software? 2 - Can an existing drive with data on it be used as aRAID drive without losing current data? 3 - Can additional drive(s) be added later with a changein RAID level without current data loss? TIA

On 2017-02-15, John R Pierce <pierce at hogranch.com> wrote: > On 2/14/2017 4:48 PM, tdukes at palmettoshopper.com wrote: > >> 3 - Can additional drive(s) be added later with a changein RAID level >> without current data loss? > > Only some systems support that sort of restriping, and its a dangerous > activity (if the power fails or system crashes midway through the > restriping operation, its probably not restartable, you quite likely > will lose the whol...

...use mdraid mirroring. > 2 - Can an existing drive with data on it be used as aRAID drive without > losing current data? software mdraid will let you add a mirror to an existing disk. or if its using LVM, you can mirror in LVM now. > 3 - Can additional drive(s) be added later with a changein RAID level > without current data loss? Only some systems support that sort of restriping, and its a dangerous activity (if the power fails or system crashes midway through the restriping operation, its probably not restartable, you quite likely will lose the whole volume)... with LVM mir...

On 2/16/2017 9:18 PM, Keith Keller wrote: > On 2017-02-15, John R Pierce<pierce at hogranch.com> wrote: >> On 2/14/2017 4:48 PM,tdukes at palmettoshopper.com wrote: >> >>> 3 - Can additional drive(s) be added later with a changein RAID level >>> without current data loss? >> Only some systems support that sort of restriping, and its a dangerous >> activity (if the power fails or system crashes midway through the >> restriping operation, its probably not restartable, you quite likely >> will l...

...now. Note; If you're mirroring /boot, you may need to run grub install on both disks to ensure they're both actually bootable (or else you might find yourself doing an emergency boot off the CentOS ISO and installing grub later). >> 3 - Can additional drive(s) be added later with a changein RAID level >> without current data loss? > > Only some systems support that sort of restriping, and its a dangerous > activity (if the power fails or system crashes midway through the > restriping operation, its probably not restartable, you quite likely > will lose the whole...