Raid 1+0

[Bernt Hansson]

On 2016-04-18 21:25, Jack L. wrote:
> What size are the disks? That should give a hint on what raid level that is.
They are all 1Tb dics. The reported size is 1,8 Tb.

> On Mon, Apr 18, 2016 at 12:22 PM, Bernt Hansson <bah at bananmonarki.se> wrote:
>> Hello list
>>
>> My motherboard has a raid chip on it (AMD SB750), so my plan was to use it.
>> Since i never used the chip for raid, i thought i might try.
>>
>> So far this has been done.
>>
>> Set up 2 arrays with 2 discs in each array with raid1 on both.
>>
>> Boot up freebsd 10.3-R. Both arrays are found
>>
>> GEOM_RAID: Promise: Disk ada0 state changed from NONE to ACTIVE.
>> GEOM_RAID: Promise: Subdisk RAID 1   LD  1:0-ada0 state changed from NONE to
>> ACTIVE.
>> GEOM_RAID: Promise: Disk ada1 state changed from NONE to ACTIVE.
>> GEOM_RAID: Promise: Subdisk RAID 1   LD  1:1-ada1 state changed from NONE to
>> ACTIVE.
>> GEOM_RAID: Promise: Volume started.
>> GEOM_RAID: Promise: Volume RAID 1   LD  1 state changed from STARTING to
>> OPTIMAL.
>> GEOM_RAID: Promise: Provider raid/r0 for volume RAID 1   LD  1 created.
>> GEOM_RAID: Promise: Disk ada2 state changed from NONE to ACTIVE.
>> GEOM_RAID: Promise: Subdisk RAID 1   LD  2:0-ada2 state changed from NONE to
>> ACTIVE.
>> GEOM_RAID: Promise: Disk ada3 state changed from NONE to ACTIVE.
>> GEOM_RAID: Promise: Subdisk RAID 1   LD  2:1-ada3 state changed from NONE to
>> ACTIVE.
>> GEOM_RAID: Promise: Volume started.
>> GEOM_RAID: Promise: Volume RAID 1   LD  2 state changed from STARTING to
>> OPTIMAL.
>> GEOM_RAID: Promise: Provider raid/r1 for volume RAID 1   LD  2 created.
>>
>> Used gstripe to stripe the arrays raid/r0 + r1 into stripe0
>>
>> Newfs/mount all work. My question, is this a raid 1+0 or 0+1?
>> More info can be posted if need be.
>>
>> # graid list
>> Geom name: Promise
>> State: OPTIMAL
>> Metadata: Promise
>> Providers:
>> 1. Name: raid/r0
>>     Mediasize: 999999995904 (931G)
>>     Sectorsize: 512
>>     Mode: r1w1e2
>>     Subdisks: ada0 (ACTIVE), ada1 (ACTIVE)
>>     Dirty: No
>>     State: OPTIMAL
>>     Strip: 65536
>>     Components: 2
>>     Transformation: RAID1
>>     RAIDLevel: RAID1
>>     Label: RAID 1   LD  1
>>     descr: Promise RAID1 volume
>> 2. Name: raid/r1
>>     Mediasize: 999999995904 (931G)
>>     Sectorsize: 512
>>     Mode: r1w1e2
>>     Subdisks: ada2 (ACTIVE), ada3 (ACTIVE)
>>     Dirty: No
>>     State: OPTIMAL
>>     Strip: 65536
>>     Components: 2
>>     Transformation: RAID1
>>     RAIDLevel: RAID1
>>     Label: RAID 1   LD  2
>>     descr: Promise RAID1 volume
>> Consumers:
>> 1. Name: ada0
>>     Mediasize: 1000204886016 (932G)
>>     Sectorsize: 512
>>     Mode: r1w1e1
>>     ReadErrors: 0
>>     Subdisks: r0(RAID 1   LD  1):0 at 0
>>     State: ACTIVE (ACTIVE)
>> 2. Name: ada1
>>     Mediasize: 1000204886016 (932G)
>>     Sectorsize: 512
>>     Mode: r1w1e1
>>     ReadErrors: 0
>>     Subdisks: r0(RAID 1   LD  1):1 at 0
>>     State: ACTIVE (ACTIVE)
>> 3. Name: ada2
>>     Mediasize: 1000204886016 (932G)
>>     Sectorsize: 512
>>     Mode: r1w1e1
>>     ReadErrors: 0
>>     Subdisks: r1(RAID 1   LD  2):0 at 0
>>     State: ACTIVE (ACTIVE)
>> 4. Name: ada3
>>     Mediasize: 1000204886016 (932G)
>>     Sectorsize: 512
>>     Mode: r1w1e1
>>     ReadErrors: 0
>>     Subdisks: r1(RAID 1   LD  2):1 at 0
>>     State: ACTIVE (ACTIVE)
>>
>>   graid status
>>     Name   Status  Components
>> raid/r0  OPTIMAL  ada0 (ACTIVE (ACTIVE))
>>                    ada1 (ACTIVE (ACTIVE))
>>                    ada2 (ACTIVE (ACTIVE))
>>                    ada3 (ACTIVE (ACTIVE))
>> raid/r1  OPTIMAL  ada0 (ACTIVE (ACTIVE))
>>                    ada1 (ACTIVE (ACTIVE))
>>                    ada2 (ACTIVE (ACTIVE))
>>                    ada3 (ACTIVE (ACTIVE))
>>
>> # gstripe status
>>            Name  Status  Components
>> stripe/stripe0      UP  raid/r0
>>                          raid/r1
>> root at testbox:/usr/home/bernt # gstripe list
>> Geom name: stripe0
>> State: UP
>> Status: Total=2, Online=2
>> Type: AUTOMATIC
>> Stripesize: 65536
>> ID: 364832905
>> Providers:
>> 1. Name: stripe/stripe0
>>     Mediasize: 1999999860736 (1.8T)
>>     Sectorsize: 512
>>     Stripesize: 65536
>>     Stripeoffset: 0
>>     Mode: r1w1e1
>> Consumers:
>> 1. Name: raid/r0
>>     Mediasize: 999999995904 (931G)
>>     Sectorsize: 512
>>     Mode: r1w1e2
>>     Number: 0
>> 2. Name: raid/r1
>>     Mediasize: 999999995904 (931G)
>>     Sectorsize: 512
>>     Mode: r1w1e2
>>     Number: 1
>