| To: | stan hoeppner <stan@xxxxxxxxxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, xfs@xxxxxxxxxxx |
|---|---|
| Subject: | Re: How to format RAID1 correctly |
| From: | Helmut Tessarek <tessarek@xxxxxxxxxxx> |
| Date: | Tue, 23 Sep 2014 23:15:57 -0400 |
| Delivered-to: | xfs@xxxxxxxxxxx |
| In-reply-to: | <542234F6.4080000@xxxxxxxxxxxxxxxxx> |
| Openpgp: | id=C11F128D |
| References: | <5422146A.90206@xxxxxxxxxxx> <54222763.40107@xxxxxxxxxxx> <5422285B.6010306@xxxxxxxxxxx> <542234F6.4080000@xxxxxxxxxxxxxxxxx> |
| User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 |
On 23.09.14 23:05 , stan hoeppner wrote: > It confuses many people who are new to md RAID1. The above is the > *bitmap* chunk size, not the array chunk size. There is no array chunk > size for RAID1 as there is no striping. You must have striping to have > chunks. With md RAID1 every 4KB page write is simply mirrored to each > physical disk. Thanks for the info. I'm used to big ass storage subsystems, but new to SW RAID. I seems I have some catching up to do. -- regards Helmut K. C. Tessarek lookup http://sks.pkqs.net for KeyID 0xC11F128D /* Thou shalt not follow the NULL pointer for chaos and madness await thee at its end. */ |
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