Re: Talking about RAID - disks with same id

2017-11-12 Thread deloptes
Pascal Hambourg wrote: > /proc/mdstat this looks good, however I tried writing to the disk and only one disk led indicates writes, so I think it is not writing on both disks. Anyway I will replace those disks thanks and regards

Re: Talking about RAID - disks with same id

2017-11-12 Thread Pascal Hambourg
Le 12/11/2017 à 17:57, deloptes a écrit : So if you know if in this context I have real RAID - I mean data is written to both drives? Sorry, I cannot tell. Insufficient data. You can check in /proc/mdstat.

Re: Talking about RAID - disks with same id

2017-11-12 Thread deloptes
Thanks Pascal, Pascal Hambourg wrote: > Le 10/11/2017 à 09:12, deloptes a écrit : >> >> >> It looks like the new style raid > > Indeed, superblock format 1.x. In addition to the "array UUID" which is > common to all members of the array, it adds a specific "device UUID" for > each member. blk

Re: Talking about RAID - disks with same id

2017-11-12 Thread Pascal Hambourg
Le 10/11/2017 à 17:46, Joe Pfeiffer a écrit : deloptes writes: you see in your case PARTUUID is different for both members. In my case it is identical and this is what is bothering me It's my understanding that PTUUID on a disk using an MBR corresponds to the UUID on a disk using a GPT, not

Re: Talking about RAID - disks with same id

2017-11-12 Thread Pascal Hambourg
Le 10/11/2017 à 09:12, deloptes a écrit : Joe Pfeiffer wrote: Here's what I see when I look at my RAID disks: /dev/sda2: UUID="67d3c233-96a0-737c-5f88-ed9b936ea3ae" UUID_SUB="48b56869-6f19-21b9-283f-3eee3ac90cf8" LABEL="snowball:1" TYPE="linux_raid_member" PARTUUID="3bb3729a-528b-4384-b6a5-b6

Re: Talking about RAID - disks with same id

2017-11-10 Thread deloptes
David Christensen wrote: > On 11/10/17 00:12, deloptes wrote: >> this raid was created ~12y ago without metadata. > > https://www.psychologytoday.com/basics/self-harm > > > ;-) > > David appreciated :D - one that respects sarcasm :D

Re: Talking about RAID - disks with same id

2017-11-10 Thread David Christensen
On 11/10/17 00:12, deloptes wrote: this raid was created ~12y ago without metadata. https://www.psychologytoday.com/basics/self-harm ;-) David

Re: Talking about RAID - disks with same id

2017-11-10 Thread deloptes
Joe Pfeiffer wrote: > It's my understanding that PTUUID on a disk using an MBR corresponds to > the UUID on a disk using a GPT, not to PARTUUID (I don't know what on an > MBR-based disk would correspond to PARTUUID, if anything). # blkid /dev/sdf1 /dev/sdf1: UUID="5427071b-25c8-fff8-476d-ff8c9852

Re: Talking about RAID - disks with same id

2017-11-10 Thread Joe Pfeiffer
deloptes writes: > Hi Joe, > > thank you for the mesage > > Joe Pfeiffer wrote: > >> This is normal.  It's the identical UUIDs that tell the system that the >> partitions go into the same RAID array. >> >> Here's what I see when I look at my RAID disks: >> >> /dev/sda2: UUID="67d3c233-96a0-737c

Re: Talking about RAID - disks with same id

2017-11-10 Thread deloptes
Hi Joe, thank you for the mesage Joe Pfeiffer wrote: > This is normal.  It's the identical UUIDs that tell the system that the > partitions go into the same RAID array. > > Here's what I see when I look at my RAID disks: > > /dev/sda2: UUID="67d3c233-96a0-737c-5f88-ed9b936ea3ae" > UUID_SUB="48

Re: Talking about RAID - disks with same id

2017-11-09 Thread Joe Pfeiffer
deloptes writes: > Hi, > I noticed recently by accident that when I read/write from the oldest raid > disks I have - only one of the tray leds blinks. Of course the led could be > damaged, but rather not, so looking into it I found that both disks in > question return same UUID. So I am concerned

Re: Talking about RAID - disks with same id

2017-11-09 Thread David Christensen
On 11/09/17 13:04, deloptes wrote: David Christensen wrote: What RAID technology are you using? Linux software raid - kernel is 4.12.10 Most people call it 'mdadm', after the command-line tool. I am running the same, but on Debian "stable": 2017-11-09 14:00:32 root@dipsy ~ # dpkg-query -

Re: Talking about RAID - disks with same id

2017-11-09 Thread deloptes
Tobx wrote: > You can change your partition UUID with fdisk (press x for extra > functionality). An easy way to create a random UUID is: > > $ cat /proc/sys/kernel/random/uuid > > If you have the chance to test this, I would give it a try. Thanks - good idea - I guess I'll first do a backup :)

Re: Talking about RAID - disks with same id

2017-11-09 Thread deloptes
Thank you for the kind answer. Here are my toughts David Christensen wrote: > Answering that question definitively would involve reviewing the source > code of all the software and firmware on your computer for anything that > is affected, directly or indirectly, by UUID's or PARTUUID's. > > >

Re: Talking about RAID - disks with same id

2017-11-09 Thread David Christensen
On 11/08/17 23:17, deloptes wrote: David Christensen wrote: While trouble-shooting PEBKAS issues is important to me, I have found that my attempts at trouble-shooting GNU/Linux issues is usually an exercise in futility.  The best I can hope for is finding a way to reproduce the issue and filing

Re: Talking about RAID - disks with same id

2017-11-09 Thread Tobx
On 8. Nov 2017, at 22:40, deloptes wrote: > How is this possible and how to solve it - I would simply add 3rd 500MB disk > to the raid and remove one of the others, but still what is the impact of > this (stupid) coincidence … I would not call it coincidence, what are the odds? There must be a r

Re: Talking about RAID - disks with same id

2017-11-08 Thread deloptes
David Christensen wrote: > My file server had a 1.5 TB desktop drive with LUKS and btrfs, created > with Debian 7.  When I rebuilt my SOHO network with Debian 8, all was > well.  But, when I rebuilt my SOHO network with Debian 9, I noted > weirdness.  I don't know if it was Debian, GNU, Linux, LUK

Re: Talking about RAID - disks with same id

2017-11-08 Thread David Christensen
On 11/08/17 13:40, deloptes wrote: Hi, I noticed recently by accident that when I read/write from the oldest raid disks I have - only one of the tray leds blinks. Of course the led could be damaged, but rather not, so looking into it I found that both disks in question return same UUID. So I am c

Talking about RAID - disks with same id

2017-11-08 Thread deloptes
Hi, I noticed recently by accident that when I read/write from the oldest raid disks I have - only one of the tray leds blinks. Of course the led could be damaged, but rather not, so looking into it I found that both disks in question return same UUID. So I am concerned now that I don't have any tr