Date: Wed, 20 Feb 2019 15:02:07 -0700 From: "@lbutlr" <kremels@kreme.com> To: Farhan Khan via freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: Duplicating file system Message-ID: <0F4BBC09-3F9D-4740-A8E4-BB3B87F2A657@kreme.com> In-Reply-To: <4CAB4BC4-0473-41CF-AF03-D1CE796F5545@cretaforce.gr> References: <0A33E3BE-96C9-4D83-B9F7-D4D2792B5161@kreme.com> <32153EA7-4BC5-4EE2-98FA-5BDEE1903BA3@cretaforce.gr> <4CAB4BC4-0473-41CF-AF03-D1CE796F5545@cretaforce.gr>
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On 20 Feb 2019, at 13:26, Christos Chatzaras <chris@cretaforce.gr> wrote: > On 20 Feb 2019, at 22:13, Christos Chatzaras <chris@cretaforce.gr> wrote: >> On 20 Feb 2019, at 21:52, Cerebus <kreme@kreme.com> wrote: >>> I have an 11.2 system with two identical SSD drives. Currently I am using rsnapshot to keep backups of the primary drive on the secondary drive, but I am interested in having the second drive have a duplicate copy of the entire file system in a bootable form, updated as the root drive is modified. >>> >>> How would I do this? >>> >>> I don’t really want a RAID0 because I want to also keep the periodic backups from rsnapshot as the drives are about 10x larger than my data. >>> >>> -- >>> This is my signature. There are many like it, but this one is mine. >> >> If both disks have the same size the easiest but not fastest way is to use dd: >> >> dd if=/dev/ada0 of=/dev/ada1 bs=64k > > I read again your message and I see that you want to keep the snapshots in 2nd drive, so instead of using dd you can: What I want is to copy all of dis1 to disk 2, bootable, but then for disk 2 to stay updated as new data is written to disk 1. So, if a log file updates on disk 1, it is updated on disk 2, if not instantly, very soon. -- If lawyers are disbarred and clergymen defrocked, doesn't it follow that electricians can be delighted, musicians denoted?
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