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OpenBSD General Other questions regarding OpenBSD which do not fit in any of the categories below. |
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When you insert the SD card in the card reader, kernel messages are produced. One of those will show the device name and number, such as sd2 or wd1. You can see these kernel messages on the console, in an xconsole(1) window, in /var/log/messages, and in dmesg(8) output. You can also list all currently connected drives with
$ sysctl hw.disknames .
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This is my saved reference for it
OpenBSD: Formatting Disks This note shows how to identify and format a disk using OpenBSD. Tools fdisk - partition table editor disklabel - BSD partition editor newfs - formatter Steps 1. Identify name of new disk, for example, insert a USB stick, then type 'dmesg' scsibus0 at umass0: 2 targets, initiator 0 sd0 at scsibus0 targ 1 lun 0: SCSI2 0/direct removable sd0: 1000MB, 512 bytes/sec, 2048000 sec total 2. Allocate the whole disk to BSD This is done so that if it is used in another operating system, it will be pre-allocated. This is done using fdisk. You can select 'help' at any time. You may wish to remove existing partitions, such as ones associated with Windows / Fat32 etc - if so, simply change the partition type to 0 using the edit command. # fdisk -e sd0 fdisk: 1> edit 3 Partition id ('0' to disable) [0 - FF]: [0] (? for help) A6 Do you wish to edit in CHS mode? [n] offset: [0] size: [0] * fdisk:*1> w Writing MBR at offset 0. fdisk: 1> q # fdisk sd0 Disk: sd0 geometry: 127/255/63 [2048000 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 0 1 - 127 122 59 [ 0: 2048000 ] OpenBSD 3. Create a whole partition on the disk with disklabel (the * means whole disk): # disklabel -E sd0 > a partition: [a] offset: [0] size: [2048000] * FS type: [4.2BSD] > w > x 4. Format the disk: # newfs sd0a /dev/rsd0a: 1000.0MB in 2048000 sectors of 512 bytes 5 cylinder groups of 202.47MB, 12958 blocks, 25984 inodes each super-block backups (for fsck -b #) at: 32, 414688, 829344, 1244000, 1658656, 5. Add an entry in the fstab file /dev/sd0a /mnt/usb ffs rw,nodev,nosuid 1 2 |
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