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On Tue, 22 Dec 2020 19:06:48 -0700
Duncan Patton a Campbell <[email protected]> wrote:

> 
> On Tue, 22 Dec 2020 18:21:30 -0700
> "Todd C. Miller" <[email protected]> wrote:
> 
> > On Tue, 22 Dec 2020 17:30:08 -0700, Duncan Patton a Campbell wrote:
> > 
> > > I've added two identical 4TB disks to my system to set up a duald RAID.  
> > >
> > > When I boot, they come up as 
> > >
> > > sd2 at scsibus1 targ 2 lun 0: <ATA, WDC WD40EFRX-68N, 82.0> 
> > > naa.50014ee268199
> > > 5d6
> > > sd2: 3815447MB, 512 bytes/sector, 7814037168 sectors
> > >
> > > and 
> > >
> > > wd0 at pciide1 channel 0 drive 0: <WDC WD40EFRX-68N32N0>
> > > wd0: 16-sector PIO, LBA48, 3815447MB, 7814037168 sectors
> > >
> > > One of these things is not like the other, and I've not located 
> > > how this distinction is made at boot time.  
> > 
> > You should check your BIOS settings and make sure all the SATA
> > channels are configured to use AHCI and not legacy ATA.
> > 
> >  - todd
> > 
> 
> YES!  That would be the problem.  It's not done on a per-channel 
> basis but there's another obscure setting at the bottom of a page
> that sets it for all ...
> 
> Thanks,
> 
> Dhu
> 

meh.  Still craziness.  I have two 4Tb disks I want to put into a RAID1 
(I want a BIIIIG partition for imaging other disks).  Neither fdisk nor
disklabel will create/recognize a part > 4294961600 (sect512)

This is the dislabel dialogue:
sd2> a a
offset: [64] 
size: [4294961621] 7814037100
FS type: [4.2BSD] 
sd2*> p
OpenBSD area: 64-4294961685; size: 4294961621; free: 21
#                size           offset  fstype [fsize bsize   cpg]
  a:       4294961600               64  4.2BSD   8192 65536     1 
  c:       7814037168                0  unused                    

fdisk seems unwilling to allow more than 2T in the partition:

atlas:/root/cde/Disks# fdisk sd2    
Disk: sd2       geometry: 267349/255/63 [4294961685 Sectors]
Offset: 0       Signature: 0xAA55
            Starting         Ending         LBA Info:
 #: id      C   H   S -      C   H   S [       start:        size ]
- 
-------------------------------------------------------------------------------
 0: 00      0   0   0 -      0   0   0 [           0:           0 ] unused      
 1: 00      0   0   0 -      0   0   0 [           0:           0 ] unused      
 2: 00      0   0   0 -      0   0   0 [           0:           0 ] unused      
*3: A6      0   1   2 - 267348 254  63 [          64:  4294961621 ] OpenBSD     

Any pointers or ideas appreciated.

Thanks,

Dhu

- -- 
Je suis Canadien. Ce n'est pas Francais ou Anglaise.  
 C'est une esp`ece de sauvage: ne obliviscaris, vix ea nostra voco;-) 
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