Redundancy in Lab 17.3 (losetup and parted)
When we are creating the primary partitions in the loop device and we used parted command/options to saymkpart primary ext4 rangestart rangeend
(step 3). Why do we then need to go and put another filesystem on the partition in step 6?
Comments
-
Hi,
That's a good question! Not sure what distro you are, but I did a test case on CentOS 8. As the way that parted works, it needs to be instructed to make filesystems on the partitions after they are created in step 3. If you do 'fdisk -l' just after step 3, you will see they marked as 'linux' partitions, but you won't be able to mount them, because the OS will say there isn't a filesystem in each of these partitions. So you will need to make them as in step 6.
The man parted(8) page says the following:
mkpart part-type [fs-type] start end
Make a part-type partition for filesystem fs-type (if specified), beginning at
start and ending at end (by default in megabytes). part-type should be one of
"primary", "logical", or "extended".So, in the command in step 3, we are specifying the fs-type (we could not and it should work anyway). But for some reason we need to format they anyway after that, or they won't mount.
Many regards,
Luis.0 -
Hmmmm Okay. Seems like the overkill and that whomever maintains or would work on how that works would maybe cut out the redundancy if it needs to have mkfs later.
0 -
Good point, I'll check if we can avoid specifying the fs-type parameter in the first command.
Regards,
Luis.0 -
It is not a redundancy. If you don't specify the fs type in the early step, I'm not sure what will show up as the type in fdisk -l. In the case of ext4 it might show up as "Linux" anyway, but what if you wanted vfat, or some other non-linux type. At any rate it is harmless and causes no extra pain.
Linux actually usually ignores the fs type from fdisk -l anyway. For instance you can use a partition for lvm even if you never mark it as such.
0 -
Hi coop,
I just did a test case on CentOS 8, and I didn't specify the fs-type in step 3, as the man parted(8) says this parameter is optional. Then I gave filesystem to the partitions as shown in step 6, and the partitions showed up correctly in the fdisk -l output. So, it looks it's right to say that specifying the fs-type in step 3 is unnecessary.
Many regards,
Luis.0
Categories
- All Categories
- 207 LFX Mentorship
- 207 LFX Mentorship: Linux Kernel
- 735 Linux Foundation IT Professional Programs
- 339 Cloud Engineer IT Professional Program
- 167 Advanced Cloud Engineer IT Professional Program
- 66 DevOps Engineer IT Professional Program
- 132 Cloud Native Developer IT Professional Program
- 122 Express Training Courses
- 122 Express Courses - Discussion Forum
- 5.9K Training Courses
- 40 LFC110 Class Forum - Discontinued
- 66 LFC131 Class Forum
- 39 LFD102 Class Forum
- 221 LFD103 Class Forum
- 17 LFD110 Class Forum
- 33 LFD121 Class Forum
- 17 LFD133 Class Forum
- 6 LFD134 Class Forum
- 17 LFD137 Class Forum
- 70 LFD201 Class Forum
- 3 LFD210 Class Forum
- 2 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 1 LFD233 Class Forum
- 3 LFD237 Class Forum
- 23 LFD254 Class Forum
- 689 LFD259 Class Forum
- 109 LFD272 Class Forum
- 3 LFD272-JP クラス フォーラム
- 10 LFD273 Class Forum
- 109 LFS101 Class Forum
- LFS111 Class Forum
- 2 LFS112 Class Forum
- 1 LFS116 Class Forum
- 3 LFS118 Class Forum
- 3 LFS142 Class Forum
- 3 LFS144 Class Forum
- 3 LFS145 Class Forum
- 1 LFS146 Class Forum
- 2 LFS147 Class Forum
- 8 LFS151 Class Forum
- 1 LFS157 Class Forum
- 14 LFS158 Class Forum
- 5 LFS162 Class Forum
- 1 LFS166 Class Forum
- 3 LFS167 Class Forum
- 1 LFS170 Class Forum
- 1 LFS171 Class Forum
- 2 LFS178 Class Forum
- 2 LFS180 Class Forum
- 1 LFS182 Class Forum
- 4 LFS183 Class Forum
- 30 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 2 LFS201-JP クラス フォーラム
- 17 LFS203 Class Forum
- 117 LFS207 Class Forum
- 1 LFS207-DE-Klassenforum
- LFS207-JP クラス フォーラム
- 301 LFS211 Class Forum
- 55 LFS216 Class Forum
- 50 LFS241 Class Forum
- 43 LFS242 Class Forum
- 37 LFS243 Class Forum
- 13 LFS244 Class Forum
- 1 LFS245 Class Forum
- 45 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 145 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- 6 LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 9 LFS258-JP クラス フォーラム
- 116 LFS260 Class Forum
- 154 LFS261 Class Forum
- 41 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 23 LFS267 Class Forum
- 18 LFS268 Class Forum
- 29 LFS269 Class Forum
- 200 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 7 LFW111 Class Forum
- 257 LFW211 Class Forum
- 178 LFW212 Class Forum
- 12 SKF100 Class Forum
- SKF200 Class Forum
- 791 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 98 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 754 Linux Distributions
- 82 Debian
- 67 Fedora
- 16 Linux Mint
- 13 Mageia
- 23 openSUSE
- 147 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 351 Ubuntu
- 465 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 91 Linux Security
- 78 Network Management
- 101 System Management
- 47 Web Management
- 56 Mobile Computing
- 17 Android
- 28 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 366 Off Topic
- 114 Introductions
- 171 Small Talk
- 20 Study Material
- 534 Programming and Development
- 293 Kernel Development
- 223 Software Development
- 1.1K Software
- 212 Applications
- 182 Command Line
- 3 Compiling/Installing
- 405 Games
- 311 Installation
- 79 All In Program
- 79 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)