diff --git a/README.md b/README.md
new file mode 100644
index 0000000..06d9860
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# Notes
+
+A collection of IT related notes
+
+This page is automatically rendered by [Chameleon](https://github.com/life4/chameleon)
diff --git a/ceph/README.md b/ceph/README.md
new file mode 100644
index 0000000..5d6ab3e
--- /dev/null
+++ b/ceph/README.md
@@ -0,0 +1,10 @@
+
+
+
+
+
+
+
+## Ceph - The future of storage
+
+I've been running Ceph at home since 2016 ([Jewel](https://docs.ceph.com/en/latest/releases/index.html) release). This is a collection of some of my notes.
diff --git a/ceph/deepscrub.md b/ceph/deepscrub.md
new file mode 100644
index 0000000..da75188
--- /dev/null
+++ b/ceph/deepscrub.md
@@ -0,0 +1,47 @@
+# PG_NOT_DEEP_SCRUBBED Warnings
+
+## TLDR
+
+Set the interval before warning to 14 days:
+
+```sh
+ceph config set global osd_deep_scrub_interval 1209600
+```
+
+## Problem
+
+My Ceph cluster runs on cheap hardware and large OSDs take a while to scrub so I'm seeing Ceph health warnings:
+
+```none
+[WRN] PG_NOT_DEEP_SCRUBBED: 43 pgs not deep-scrubbed in time
+ pg 11.71 not deep-scrubbed since 2022-11-20T23:06:43.607051+0100
+ pg 7.78 not deep-scrubbed since 2022-11-21T18:39:17.628021+0100
+```
+
+## Default configuration
+
+The default interval before warning is seven days:
+
+```none
+root@pve:~# ceph config show-with-defaults mgr.pve | grep osd_deep_scrub_interval
+osd_deep_scrub_interval 604800.000000 default
+```
+
+604800 seconds = 7 days
+
+## Increase window to 14 days
+
+I didn't want to spend more hours per day scrubbing, so for me the solution was to increase the windows to 14 days (1209600 seconds).
+
+```sh
+ceph config set global osd_deep_scrub_interval 1209600
+```
+
+## Other notes
+
+You can also adjust the number of hours per day scrubbing happens and which days:
+
+* [osd_scrub_begin_hour](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_begin_hour)
+* [osd_scrub_end_hour](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_end_hour)
+* [osd_scrub_begin_week_day](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_begin_week_day)
+* [osd_scrub_end_week_day](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_end_week_day)
diff --git a/ceph/logo.png b/ceph/logo.png
new file mode 100644
index 0000000..10e65a4
Binary files /dev/null and b/ceph/logo.png differ
+
+
+## Ceph - The future of storage
+
+I've been running Ceph at home since 2016 ([Jewel](https://docs.ceph.com/en/latest/releases/index.html) release). This is a collection of some of my notes.
diff --git a/ceph/deepscrub.md b/ceph/deepscrub.md
new file mode 100644
index 0000000..da75188
--- /dev/null
+++ b/ceph/deepscrub.md
@@ -0,0 +1,47 @@
+# PG_NOT_DEEP_SCRUBBED Warnings
+
+## TLDR
+
+Set the interval before warning to 14 days:
+
+```sh
+ceph config set global osd_deep_scrub_interval 1209600
+```
+
+## Problem
+
+My Ceph cluster runs on cheap hardware and large OSDs take a while to scrub so I'm seeing Ceph health warnings:
+
+```none
+[WRN] PG_NOT_DEEP_SCRUBBED: 43 pgs not deep-scrubbed in time
+ pg 11.71 not deep-scrubbed since 2022-11-20T23:06:43.607051+0100
+ pg 7.78 not deep-scrubbed since 2022-11-21T18:39:17.628021+0100
+```
+
+## Default configuration
+
+The default interval before warning is seven days:
+
+```none
+root@pve:~# ceph config show-with-defaults mgr.pve | grep osd_deep_scrub_interval
+osd_deep_scrub_interval 604800.000000 default
+```
+
+604800 seconds = 7 days
+
+## Increase window to 14 days
+
+I didn't want to spend more hours per day scrubbing, so for me the solution was to increase the windows to 14 days (1209600 seconds).
+
+```sh
+ceph config set global osd_deep_scrub_interval 1209600
+```
+
+## Other notes
+
+You can also adjust the number of hours per day scrubbing happens and which days:
+
+* [osd_scrub_begin_hour](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_begin_hour)
+* [osd_scrub_end_hour](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_end_hour)
+* [osd_scrub_begin_week_day](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_begin_week_day)
+* [osd_scrub_end_week_day](https://docs.ceph.com/en/latest/rados/configuration/osd-config-ref/#confval-osd_scrub_end_week_day)
diff --git a/ceph/logo.png b/ceph/logo.png
new file mode 100644
index 0000000..10e65a4
Binary files /dev/null and b/ceph/logo.png differ