Creating a UFS File System on an External Hard Drive with Solaris 10
Recently, I wanted to create a UFS file system on a Maxtor OneTouch II external hard drive I have. I wanted to use the external hard drive for storing some large files and I was going to use the drive exclusively with one of my Solaris systems. Now, I didn’t find much information on the web about how to perform this with Solaris (maybe I wasn’t searching very well or something) so I thought I would post the procedure I followed here so I’ll know how to do it again if I need to.
After plugging the hard drive into my system via one of the USB ports, we can verify that the disk was recognized by the OS by examining the
/var/adm/messages file. With the hard drive I was using, I saw entries like the following:
Mar 2 13:10:33 solaris-filer usba: [ID 912658 kern.info] USB 2.0 device (usbd49,7100) operating at hi speed (USB 2.x) on USB 2.0 root hub: storage@3, scsa2usb0 at bus address 2 Mar 2 13:10:33 solaris-filer usba: [ID 349649 kern.info] Maxtor OneTouch II L60LHYQG Mar 2 13:10:33 solaris-filer genunix: [ID 936769 kern.info] scsa2usb0 is /pci@0,0/pci1028,11d@1d,7/storage@3 Mar 2 13:10:33 solaris-filer genunix: [ID 408114 kern.info] /pci@0,0/pci1028,11d@1d,7/storage@3 (scsa2usb0) online Mar 2 13:10:33 solaris-filer scsi: [ID 193665 kern.info] sd1 at scsa2usb0: target 0 lun 0
The dmesg command could also be used to see similar information. Also, we could use the rmformat command (this lists removable media) to see this information in a much nicer format like so:
# rmformat -l Looking for devices... 1. Logical Node: /dev/rdsk/c1t0d0p0 Physical Node: /pci@0,0/pci-ide@1f,1/ide@1/sd@0,0 Connected Device: QSI CDRW/DVD SBW242U UD25 Device Type: DVD Reader 2. Logical Node: /dev/rdsk/c2t0d0p0 Physical Node: /pci@0,0/pci1028,11d@1d,7/storage@3/disk@0,0 Connected Device: Maxtor OneTouch II 023g Device Type: Removable #
Now that we now the drive has been identified by Solaris (as
/dev/rdsk/c2t0d0p0) we need to create one Solaris partition (this is Solaris 10 running on the x86 architecture) that uses the whole disk. This accomplished by passing the
-B flag to the
fdisk command, like so:
# fdisk -B /dev/rdsk/c2t0d0p0
Now we will print the disk table to standard out like so:
# fdisk -W - /dev/rdsk/c2t0d0p0
This will output the following information to the screen for the hard drive I am using:
* /dev/rdsk/c2t0d0p0 default fdisk table * Dimensions: * 512 bytes/sector * 63 sectors/track * 255 tracks/cylinder * 36483 cylinders * * systid: * 1: DOSOS12 * 2: PCIXOS * 4: DOSOS16 * 5: EXTDOS * 6: DOSBIG * 7: FDISK_IFS * 8: FDISK_AIXBOOT * 9: FDISK_AIXDATA * 10: FDISK_0S2BOOT * 11: FDISK_WINDOWS * 12: FDISK_EXT_WIN * 14: FDISK_FAT95 * 15: FDISK_EXTLBA * 18: DIAGPART * 65: FDISK_LINUX * 82: FDISK_CPM * 86: DOSDATA * 98: OTHEROS * 99: UNIXOS * 101: FDISK_NOVELL3 * 119: FDISK_QNX4 * 120: FDISK_QNX42 * 121: FDISK_QNX43 * 130: SUNIXOS * 131: FDISK_LINUXNAT * 134: FDISK_NTFSVOL1 * 135: FDISK_NTFSVOL2 * 165: FDISK_BSD * 167: FDISK_NEXTSTEP * 183: FDISK_BSDIFS * 184: FDISK_BSDISWAP * 190: X86BOOT * 191: SUNIXOS2 * 238: EFI_PMBR * 239: EFI_FS * * Id Act Bhead Bsect Bcyl Ehead Esect Ecyl Rsect Numsect 191 128 0 1 1 254 63 1023 16065 586083330
We now need to calculate the maximum amount of usable storage. This is done by multiplying bytes/sectors (512 in my case) by the number of sectors listed at the bottom of the output shown above. We then divide this number by 10241024 to yield MBs.
So in my case, this will work out as 286173.5009765625 MB.
Now, we need to setup a partition table file. This will be a regular text file and you can name it whatever you like. For the sake of this post, I will name it disk_slices.txt. The contents of this file are:
slices: 0 = 2MB, 286170MB, "wm", "root" : 1 = 0, 1MB, "wu", "boot" : 2 = 0, 286172MB, "wm", "backup"
To create these slices on the disk, we run:
# rmformat -s disk_slices.txt /dev/rdsk/c2t0d0p0 # devfsadm # devfsadm -C
To create the UFS file system on the newly created slice, I run the following and the output from running this command is also shown:
# newfs /dev/rdsk/c2t0d0s0 newfs: construct a new file system /dev/rdsk/c2t0d0s0: (y/n)? y /dev/rdsk/c2t0d0s0: 586076160 sectors in 95390 cylinders of 48 tracks, 128 sectors 286170.0MB in 5962 cyl groups (16 c/g, 48.00MB/g, 5824 i/g) super-block backups (for fsck -F ufs -o b=#) at: 32, 98464, 196896, 295328, 393760, 492192, 590624, 689056, 787488, 885920, Initializing cylinder groups: ............................................................................... ........................................ super-block backups for last 10 cylinder groups at: 585105440, 585203872, 585302304, 585400736, 585499168, 585597600, 585696032, 585794464, 585892896, 585991328 #
And now I’m finished, I now have a UFS file system created on my USB hard drive which can be mounted by my Solaris system. To mount this file system, I can just:
# mount -F ufs /dev/rdsk/c2t0d0p0 /u01
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