Assume that we have two disks, one master SATA and one master ATA. How will they show up in /dev?
Answers:
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Method 1
Depending on your SATA driver and your distribution’s configuration, they might show up as /dev/hda and /dev/hdb, or /dev/hda and /dev/sda, or /dev/sda and /dev/sdb. Distributions and drivers are moving towards having everything hard disk called sd?, but PATA drivers traditionally used hd? and a few SATA drivers also did.
The device names are determined by the udev configuration. For example, on Ubuntu 10.04, the following lines from /lib/udev/rules.d/60-persistent-storage.rules make all ATA hard disks appear as /dev/sd* and all ATA CD drives appear as /dev/sr*:
# ATA devices with their own "ata" kernel subsystem
KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="ata", IMPORT{program}="ata_id --export $tempnode"
# ATA devices using the "scsi" subsystem
KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", IMPORT{program}="ata_id --export $tempnode"
Method 2
If I’m understanding your question correctly, the first parallel ATA hard drive under Linux will be /dev/hda, the second will be /dev/hdb, followed by /dev/hdc, etc.
Serial ATA devides will show up the same way SCSI and USB devices do: /dev/sda will be the first one, followed by /dev/sdb, /dev/sdc/, etc.
Method 3
- SATA –
/dev/sdX - SSD –
/dev/sdX - SCSCi –
/dev/sdX - IDE –
/dev/hda
Any drive which start with S (sata,ssd,scsci) is sda and IDE is hda
Method 4
Other answers discuss SATA, IDE, SCSI, etc, but I thought I’d add the new NVMe. In modern kernels, NVMe drives use /dev/nvmeXnY for a drive, and /dev/nvmeXnYpZ for partitions. For example, partition 5 on NVMe drive (0, 1) would be /dev/nvme0n1p5. The block devices behave just like the hdX and sdX drives.
Essentially, parrallel connections use hdX and serial connections use sdX, and NVMe, the oddball, uses nvmeXnY
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0