On Monday 27 January 2020 19:34:30 ghe wrote: > On 1/27/20 11:00 AM, Aidan Gauland wrote: > > Can a r-pi be set up with RAID easily? > > Define 'easily' :-) > > Its OS is a reasonably close clone of Debian, and I've had very little > trouble doing *nix tricks with it. But there's no disk and no SATA > interfaces. A couple USB disks would do it, but I don't know if it'd > recognize then for a RAID. I have 2 ssd's plugged into usb3 ports on an rpi4. Here is one of them from dmsg: 2.173892] usb 1-1.3: new high-speed USB device number 3 using xhci_hcd [ 2.306431] usb 1-1.3: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice=41.43 [ 2.307897] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 2.309338] usb 1-1.3: Product: USB2.0 Hub [ 2.310764] usb 1-1.3: Manufacturer: GenesysLogic [ 2.314556] hub 1-1.3:1.0: USB hub found [ 2.315936] EXT4-fs (mmcblk0p2): recovery complete [ 2.317714] hub 1-1.3:1.0: 4 ports detected [ 2.320755] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) [ 2.322331] VFS: Mounted root (ext4 filesystem) readonly on device 179:2. [ 2.324827] devtmpfs: mounted [ 2.335159] Freeing unused kernel memory: 2048K [ 2.336815] Run /sbin/init as init process [ 2.454363] usb 2-2: new SuperSpeed Gen 1 USB device number 2 using xhci_hcd [ 2.485525] usb 2-2: New USB device found, idVendor=174c, idProduct=55aa, bcdDevice= 1.00 [ 2.487069] usb 2-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [ 2.488542] usb 2-2: Product: AS2115 [ 2.490054] usb 2-2: Manufacturer: ASMedia [ 2.491505] usb 2-2: SerialNumber: 000003004EFE [ 2.520605] scsi host0: uas [ 2.532480] scsi 0:0:0:0: Direct-Access ADATA SU 650 0 PQ: 0 ANSI: 6 [ 2.535805] sd 0:0:0:0: [sda] 468862128 512-byte logical blocks: (240 GB/224 GiB) [ 2.536048] sd 0:0:0:0: [sda] Write Protect is off [ 2.536056] sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00 [ 2.536500] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 2.537423] sd 0:0:0:0: [sda] Optimal transfer size 33553920 bytes [ 2.541241] sda: sda1 [ 2.556909] sd 0:0:0:0: [sda] Attached SCSI disk
If mdadmin can recognize that I see no reason a 2 disk raid array can't be done. One plugged into each of the usb3 ports on an rpi4b. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>