# How to set new partition size with mender-convert **URL:** \ **Category:** General Discussions\ **Tags:** raspbian, mender-convert, rpi0w\ **Created:** [March 20, 2019, 8:22pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399 "2019-03-20T20:22:34Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![andrew\_wilcox](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/andrew_wilcox/32/165_2.png) [@andrew\_wilcox](https://hub.mender.io/u/andrew_wilcox)\ **Post date:** [March 20, 2019, 8:22pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/1 "2019-03-20T20:22:34Z")
OK! I completed the “Convert the Raspberry Pi disk image to support Mender” section, flashed the .sdimg file to a SD disk, booted it on the Pi, the Mender daemon is running and I was able to authorize the device in hosted Mender. 👍 Next I tried creating my “golden image”. I flashed `2018-11-13-raspbian-stretch-lite.img` to a second SD card, booted it on the Pi, and made a change to the filesystem (I created a file “two” in the /home/pi directory as a marker). I then copied the SD card on my Mac to a `two.img` file using dd. (The resulting two.img file was 15GB, the size of the SD card). To check the img file, I flashed the file back to the SD card using Etcher and verified that I was able to boot the SD card on the Pi and see my filesystem change. Now I ran `docker-mender-convert` with the raw disk image set to `two.img`, but it’s trying to create two 15GB partitions: ```auto ***Data partition size set to default value: 128MB*** ***Total storage size set to default value: 8GB*** 1/9 Repartitioning raw disk image... Detected raw disk image with 2 partition(s). Calculating partitions' sizes of the Mender image. Adjust Mender disk image size to the total storage size (8000MB). Defined total storage size of MB is too small. Minimal required storage is 30448MB. Aborting. Check /mender-convert/output/build.log for details. ``` Is there a way to tell mender-convert that I only want 4GB partitions? I thought maybe `raw-disk-image-shrink-rootfs` was what I might want to use, but I’m not sure how to use it: ```auto ./docker-mender-convert raw-disk-image-shrink-rootfs --raw-disk-image input/two.img IMAGE_NAME=mender-convert MENDER_CONVERT_DIR="$(pwd)" mkdir -p output docker run \ --mount type=bind,source="$MENDER_CONVERT_DIR,target=/mender-convert" \ --privileged=true \ $IMAGE_NAME "$@" Running mender-convert raw-disk-image-shrink-rootfs --raw-disk-image input/two.img ***Data partition size set to default value: 128MB*** ***Total storage size set to default value: 8GB*** 1/1 Shrinking raw disk image root filesystem... ./mender-convert: line 191: local: `=': not a valid identifier ./mender-convert: line 191: local: `512': not a valid identifier ./mender-convert: line 201: 98304 * : syntax error: operand expected (error token is "* ") ``` Or should I shrink the partition on my “golden” SD card to 4GB before copying it to my .img file? ---
**Author:** ![mirzak](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mirzak/32/2056_2.png) [@mirzak](https://hub.mender.io/u/mirzak)\ **Post date:** [March 20, 2019, 8:46pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/2 "2019-03-20T20:46:24Z")
I moved this to a separate topic as we are now entering more generic information. > Is there a way to tell mender-convert that I only want 4GB partitions? Yes `mender-convert` has an option `--storage-total-size-mb` where you can specify a total size in MB, and this is used to calculate the partition sizes. There is also a variable to set the data part size (`data-part-size-mb`), typically you do not need to set this to a very high number as this will be expanded to occupy the “rest of the disk” on first boot. To calculate rootfs partition size there is a simple formula, ``` rootfs partition size = (storage-total-size-mb - data-part-size-mb - boot part size (40MB)) / 2 ``` But there is a caveat, rootfs partition size can not be smaller then the size of the input image. > I thought maybe `raw-disk-image-shrink-rootfs` was what I might want to use, but I’m not sure how to use it: And this is where `raw-disk-image-shrink-rootfs` comes in, to be able to shrink the expanded image to `actual size + 20 % free space`, and then it can be resized using `--storage-total-size-mb` Also the reason why your rootfs is 15GB is because by default Raspbian will also resize the rootfs partition on first boot to fill the disk, and I am assuming that you have a 16 GB SD card. The command that you used to run `raw-disk-image-shrink-rootfs` is correct. The problem you are seeing is fixed [here](https://github.com/mendersoftware/mender-convert/commit/1b6f2425074b8246516f91340dcd6b8881688645). The reason that you are seeing this bug is that the `mender-convert` used for `rpi0w` is not the official [mender-convert repository](https://github.com/mendersoftware/mender-convert) and is instead based on a [fork](https://github.com/nandra/mender-conversion-tools/commits/rpi0w-toolchain). A link to a very long discussion on why can be found [here](https://github.com/mendersoftware/mender-convert/pull/59). If you look at the linked commit for the `raw-disk-image-shrink-rootfs` fix, you can easily patch that locally for now. But I am sure that @MarekBelisko will sync up his fork when he has some time. ---
**Author:** ![MarekBelisko](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/marekbelisko/32/33_2.png) [@MarekBelisko](https://hub.mender.io/u/MarekBelisko)\ **Post date:** [March 20, 2019, 9:16pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/3 "2019-03-20T21:16:08Z")
Yes certainly. I’ll rebase on latest mender-convert and probably do new fork to also have correct repo name. Thanks. @andrew_wilcox keep you updated. ---
**Author:** ![andrew\_wilcox](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/andrew_wilcox/32/165_2.png) [@andrew\_wilcox](https://hub.mender.io/u/andrew_wilcox)\ **Post date:** [March 20, 2019, 9:17pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/4 "2019-03-20T21:17:05Z")
Thank you @mirzak, I appreciate the detailed reply! ---
**Author:** ![HerrMuellerluedensch](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/herrmuellerluedensch/32/513_2.png) [@HerrMuellerluedensch](https://hub.mender.io/u/HerrMuellerluedensch)\ **Post date:** [January 16, 2020, 6:38pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/5 "2020-01-16T18:38:45Z")
Hey, Are `--storage-total-size-mb` and `--data-part-size-mb` still supported? 'Cause my docker-mender-convert complaints that these two options are not supported. How else can the partition sizes be modified from `mender-convert`? ---
**Author:** ![HerrMuellerluedensch](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/herrmuellerluedensch/32/513_2.png) [@HerrMuellerluedensch](https://hub.mender.io/u/HerrMuellerluedensch)\ **Post date:** [January 16, 2020, 6:49pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/6 "2020-01-16T18:49:35Z")
Answering the last question myself: Prepend the according yocto variables: [https://docs.mender.io/2.2/artifacts/yocto-project/variables](https://docs.mender.io/2.2/artifacts/yocto-project/variables) However, the command line arguments are not support anymore, right? ---
**Author:** ![HerrMuellerluedensch](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/herrmuellerluedensch/32/513_2.png) [@HerrMuellerluedensch](https://hub.mender.io/u/HerrMuellerluedensch)\ **Post date:** [January 16, 2020, 6:53pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/7 "2020-01-16T18:53:34Z")
Turns out that prepending the `MENDER_` variable does not seem to have an effect (except for `MENDER_ARTIFACT_NAME`. cmd call: ```auto MENDER_ARTIFACT_NAME=qs-v0.0.1 MENDER_STORAGE_TOTAL_SIZE_MB=8000 MENDER_DATA_PART_SIZE_MB=300 ./docker-mender-convert --disk-image input/qs-golden-base.img --config configs/raspberrypi3_config --overlay ./rootfs_overlay_demo ``` a few lines below: ```auto 2020-01-16 18:51:39 [INFO] [mender-convert-extract] PART 1: SIZE: 256M TYPE: 0xc ``` Or does the partition size have to be 2 to the power of something? ---
**Author:** ![mirzak](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mirzak/32/2056_2.png) [@mirzak](https://hub.mender.io/u/mirzak)\ **Post date:** [January 17, 2020, 9:50am UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/8 "2020-01-17T09:50:27Z")
It is only possible to provide the ` MENDER_ARTIFACT_NAME` on the CLI, the rest of the variables are take from configuration files. You can provide your own values by creating a custom configuration file and provide it using the `--config` option. More info can be found here, [https://docs.mender.io/development/artifacts/debian-family/image-configuration#configuration-files](https://docs.mender.io/development/artifacts/debian-family/image-configuration#configuration-files) ---
**Author:** ![jem2e4](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/jem2e4/32/504_2.png) [@jem2e4](https://hub.mender.io/u/jem2e4)\ **Post date:** [February 11, 2020, 5:19pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/9 "2020-02-11T17:19:28Z")
Hello, I’m new to Mender and I’ve been using the mender-convert scripts on Raspbian Buster. When I first cloned the mender-convert repository the default scripts worked great with my 16g golden images. After pulling the master yesterday (some client updates were needed) I’m getting similar results to Andrew above and would like to use the raw-disk-image-shrink-rootfs for similar output of sdimg and artifacts if possible. Note: I’m using a PI 3b+ not a 0 New log output: > Running mender-convert --disk-image input/GI\_618\_1-29-20\_Deploy.img --config configs/raspberrypi3\_config --overlay ./rootfs\_overlay\_demo > 2020-02-11 15:30:18 [INFO] [mender-convert-modify] Performing platform specific modifications (if any) > 2020-02-11 15:30:18 [INFO] [mender-convert-modify] Performing user/local specific modifications (if any) > 2020-02-11 15:30:18 [INFO] [mender-convert-modify] Applying rootfs overlay: ./rootfs\_overlay\_demo > mender-convert-modify has finished. Cleaning up… > Running mender-convert-package: --disk-image input/GI\_618\_1-29-20\_Deploy.img --config configs/raspberrypi3\_config --overlay ./rootfs\_overlay\_demo > 2020-02-11 15:30:18 [INFO] [mender-convert-package] Using configuration file: configs/mender\_convert\_config > 2020-02-11 15:30:19 [INFO] [mender-convert-package] Using configuration file: configs/raspberrypi3\_config > 2020-02-11 15:30:19 [WARN] [mender-convert-package] The allocated boot part size 40 MiB is too small. > 2020-02-11 15:30:19 [WARN] [mender-convert-package] The actual boot part size is 256 MiB > 2020-02-11 15:30:19 [WARN] [mender-convert-package] Will adjust MENDER\_BOOT\_PART\_SIZE\_MB automatically > 2020-02-11 15:30:19 [WARN] [mender-convert-package] Considered adjusting the configuration file to avoid this message > 2020-02-11 15:30:20 [WARN] [mender-convert-package] The calculated rootfs partition size 3892 MiB is too small. > 2020-02-11 15:30:20 [WARN] [mender-convert-package] The actual rootfs image size is 4976 MiB > 2020-02-11 15:30:20 [FATAL] [mender-convert-package] You can try adjusting the MENDER\_STORAGE\_TOTAL\_SIZE\_MB variable to increase available space, or modify one of the variables IMAGE\_ROOTFS\_SIZE, IMAGE\_ROOTFS\_EXTRA\_SPACE or IMAGE\_OVERHEAD\_FACTOR to reduce the size of the root filesystem. > mender-convert-package has finished. Cleaning up… Where can I add the raw-disk-image-shrink-rootfs option or should I work with the MENDER\_STORAGE\_TOTAL\_SIZE\_MB and other options in the mender\_convert\_config? Thanks for any help. ---
**Author:** ![drewmoseley](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/drewmoseley/32/47_2.png) [@drewmoseley](https://hub.mender.io/u/drewmoseley)\ **Post date:** [February 11, 2020, 5:57pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/10 "2020-02-11T17:57:02Z")
Hi @jem2e4, welcome to Mender hub. The specific option you mention is not part of the new iteration of mender-convert. I suspect the right approach here is to minimize the MENDER\_STORAGE\_TOTAL\_SIZE\_MB setting and then grow the size of the data partition on first boot. @mirzak anything to add? ---
**Author:** ![jem2e4](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/jem2e4/32/504_2.png) [@jem2e4](https://hub.mender.io/u/jem2e4)\ **Post date:** [February 11, 2020, 11:22pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/11 "2020-02-11T23:22:08Z")
@drewmoseley Thanks for the information! I’ve moved forward with the necessary sizing changes. However, after using the new mender-convert the unit checked in w/ hosted mender the version is odd: > mender\_client\_version > 25491c0 > mender -version reports the same on the unit. Is that current? ---
**Author:** ![drewmoseley](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/drewmoseley/32/47_2.png) [@drewmoseley](https://hub.mender.io/u/drewmoseley)\ **Post date:** [February 12, 2020, 2:26pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/12 "2020-02-12T14:26:20Z")
Hi @jem2e4 that is the commit has of the current head of MASTER. In my Yocto build which is explicitly using a tagged release, it reports “2.1.2”. My guess is that when mender-convert is officially released, this will change on your build as well. @lluiscampos @mirzak can either of you confirm? ---
**Author:** ![lluiscampos](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/lluiscampos/32/112_2.png) [@lluiscampos](https://hub.mender.io/u/lluiscampos)\ **Post date:** [March 6, 2020, 12:59pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/13 "2020-03-06T12:59:48Z")
Hi @jem2e4, We just released `mender-convert` 2.0.0. Could you give it a try and see if your issues are fixed in our stable release? You just need to checkout the correct version with: ```auto git fetch && git checkout 2.0.0 ``` Thanks ---
**Author:** ![jem2e4](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/jem2e4/32/504_2.png) [@jem2e4](https://hub.mender.io/u/jem2e4)\ **Post date:** [March 27, 2020, 2:21pm UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/14 "2020-03-27T14:21:38Z")
@lluiscampos, Yes, thanks! It works well. ---
**Author:** ![Terence](https://avatars.discourse-cdn.com/v4/letter/t/aca169/32.png) [@Terence](https://hub.mender.io/u/Terence)\ **Post date:** [March 10, 2021, 9:47am UTC](https://hub.mender.io/t/how-to-set-new-partition-size-with-mender-convert/399/15 "2021-03-10T09:47:40Z")
Hi @mirzak , I think that would be really helpful to have the rootfs parition size calculation formula in the doc. Especially on this page: [Partition configuration | Mender documentation](https://docs.mender.io/system-updates-yocto-project/board-integration/partition-configuration)