Date: Thu, 2 Jun 2022 22:07:32 +0100 From: Steve O'Hara-Smith <steve@sohara.org> To: Dale Scott <dalescott@shaw.ca> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: Effect of using SATA 2.x and 3.x in zfs mirrored config Message-ID: <20220602220732.358b6b81b07d35ac608c88b1@sohara.org> In-Reply-To: <1706301853.51806224.1654176891423.JavaMail.zimbra@shaw.ca> References: <1706301853.51806224.1654176891423.JavaMail.zimbra@shaw.ca>
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On Thu, 2 Jun 2022 07:34:51 -0600 (MDT) Dale Scott <dalescott@shaw.ca> wrote: > Looking in dmesg, I see one of the drives is using SATA 3 (600MB/s > transfer), and the other is using SATA 2 (300MB/s transfer). Will mixing > SATA 2 and SATA 3 drives cause any technical issues? Is there any reason > why I should use SATA 2 for both drives? No reason at all to do so, but it probably wouldn't hurt either, I doubt the drives can exceed SATA 2 speeds for long if at all. ZFS won't know or care what underpins the devices. I've even mirrored a laptop SSD with an iSCSI accessed zvol on a NAS - it worked fine (I didn't try disaster recovery, that would take some thinking about) the main aim was to make a weekly scrub worthwhile. -- Steve O'Hara-Smith <steve@sohara.org>
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