vault backup: 2025-05-05 16:48:06

.obsidian/community-plugins.json

@@ -5,7 +5,6 @@
   "obsidian-icon-folder",
   "obsidian-advanced-slides",
   "obsidian-annotator",
-  "obsidian-markmind",
   "obsidian-wakatime",
   "omnisearch",
   "obsidian-enhancing-export",
@@ -15,5 +14,6 @@
   "emoji-shortcodes",
   "advanced-canvas",
   "obsidian-tracker",
-  "better-export-pdf"
+  "better-export-pdf",
+  "obsidian-mind-map"
 ]

.obsidian/plugins/obsidian-markmind/data.json

@@ -1,18 +0,0 @@
-{
-  "canvasSize": 8000,
-  "headLevel": 2,
-  "fontSize": 16,
-  "background": "transparent",
-  "layout": "mindmap",
-  "layoutDirect": "mindmap",
-  "protocol": "jump-to-pdf",
-  "registerPdfEvent": true,
-  "viewerTheme": 2,
-  "mindmapmode": "basic",
-  "parseMindMap": true,
-  "annotateTop": 0,
-  "annotateBottom": 0,
-  "useCustomShortcut": false,
-  "highlightFormat": "\nPage:{{page}}\n<span style=\"color:rgb({{color}})\">■</span>:{{highlightText}}\nComment:{{comment}}\n[📌]({{link}})\n^{{id}}\n",
-  "uid": "00p01100q00t01300o01300r01300t01200o013"
-}

.obsidian/plugins/obsidian-markmind/manifest.json

@@ -1,10 +0,0 @@
-{
-	"id": "obsidian-markmind",
-	"name": "Markmind",
-	"version": "3.0.2",
-	"minAppVersion": "0.9.12",
-	"description": "This is a mindmap , outline tool for obsidian.",
-	"author": "Mark",
-	"authorUrl": "https://github.com/MarkMindCkm/obsidian-markmind",
-	"isDesktopOnly": false
-}

.obsidian/plugins/obsidian-mind-map/manifest.json

@@ -0,0 +1,8 @@
+{
+  "id": "obsidian-mind-map",
+  "name": "Mind Map",
+  "version": "1.1.0",
+  "description": "A plugin to preview notes as Markmap mind maps",
+  "isDesktopOnly": false,
+  "js": "main.js"
+}

.obsidian/workspace.json

@@ -4,11 +4,11 @@
     "type": "split",
     "children": [
       {
-        "id": "1bd3c6c2ca7655f0",
+        "id": "31174fbd9a68be49",
         "type": "tabs",
         "children": [
           {
-            "id": "565b9e04e8704d81",
+            "id": "f9fe04cad473d20c",
             "type": "leaf",
             "state": {
               "type": "markdown",
@@ -198,27 +198,26 @@
       "omnisearch:Omnisearch": false
     }
   },
-  "active": "56bef0584922cba9",
+  "active": "f9fe04cad473d20c",
   "lastOpenFiles": [
-    "Operating Systems/assets/Pasted image 20250505161031.png",
+    "Operating Systems/assets/Pasted image 20250505163335.png",
     "Operating Systems/Inter-Process Communication.md",
-    "Operating Systems/Memory Management.md",
-    "Operating Systems/Overview.md",
-    "Operating Systems/Scheduling.md",
     "Operating Systems/Processes and Threads.md",
+    "Operating Systems/Scheduling.md",
+    "Operating Systems/Overview.md",
+    "Operating Systems/File Systems Management.md",
+    "Operating Systems/assets/Pasted image 20250505162331.png",
+    "Operating Systems/assets/Pasted image 20250505161542.png",
+    "Operating Systems/assets/Pasted image 20250505161031.png",
+    "Operating Systems/Memory Management.md",
     "Operating Systems/Virtual Memory.md",
     "Operating Systems/assets/Pasted image 20250505155546.png",
-    "Operating Systems/File Systems Management.md",
     "Operating Systems/assets/Pasted image 20250505160518.png",
     "Untitled.md",
     "Operating Systems/assets/Pasted image 20250505154746.png",
     "Operating Systems/assets/Pasted image 20250505144352.png",
     "Operating Systems/assets/Pasted image 20250505042548.png",
     "Operating Systems/assets/Pasted image 20250505042419.png",
-    "Operating Systems/assets/Pasted image 20250204103541.png",
-    "Operating Systems/assets/Pasted image 20250502183523.png",
-    "Operating Systems/assets/Pasted image 20250502183221.png",
-    "Operating Systems/assets/Pasted image 20250502183310.png",
     "README.md",
     "Untitled.canvas",
     "Discrete Structures/Midterm/attempt 2.md",

Operating Systems/File Systems Management.md

@@ -217,9 +217,15 @@ The table itself is a list of blocks where many links are created and stored. Ea
 
 
 
-
-
-
+Note the reserved blocks. They contain:
+- Boot sector (VBR)
+	- Bios parameter block
+	- Bootloader code
+	- Sector, cluster size, FAT count, root directory location
+- FS information Sector (only for FAT32)
+	- Last allocated cluster for speed
+- Backup boot sector
+	- In case of corruption
 
 
 #### Free blocks list
@@ -231,7 +237,91 @@ Stores a value for each cluster which can indicate:
 
 To find a free block we just need to search for the first available cluster. We keep the last allocated cluster, optimizing search time.
 ### NTFS
-New Technologies File System
+New Technologies File System.
+
+- Everything is a cluster
+- Size is a multiple of disk block size
+- Journaling
+- File data compression
+
+![](Pasted%20image%2020250505161542.png)
+
+
+- Boot sector (VBR)
+	- NTFS signature and other boot info
+	- Location of Master File Table (MFT)
+	- Sector 0 of partition
+- MFT
+	- Stores metadata for every file and directory
+	- MFT entry that stores attributes
+		- name
+		- size
+		- timestamps
+		- security
+	- MFT itself is described in the MFT lmfao
+- File system metadata
+	- $MFT, $Bitmap , $LogFile, $Secure, etc. store metadata
+	- System files are treated like regular files
+- Data
+	- Actual file content, either stored in MFT for small entries or in separate clusters (large files)
+	- Uses extents[^4] and B+ trees[^5]
+- Supports encryption
+
+#### MFT entry
+Each file or directory is represented by a 1KB entry:
+- File name
+- Info (timestamps, perms)
+- Data location (resident[^6] or not)
+- Index
+- Attributes
+![](Pasted%20image%2020250505162331.png)
+
+
+
+##### `$DATA`
+- Mft Entry
+- If the file contains regular data, the `$DATA` attribute stores the file content or the location
+- For files that fit in a single MFT record (1KB usually)
+- In-place storage of data (resident)
+- For larger files, the `$DATA` attribute contains data runs, which are pointers that tell NTFS where the file's data is located on the disk. Typically a sequence of three values
+	- offset/ length byte
+	- Cluster count
+	- Cluster offset
+
+##### Bitmaps
+- Map of logical clusters in use and not. Same as FAT.
+
+##### Compression
+Compresses  data in 16-cluster chunks.
+Size of a compression unit (chunk) depends on cluster size:
+- 4 KB cluster size -> 64 KB compression unit (most common on modern volumes)
+- 8 KB cluster size -> 128 KB compression unit
+If a chunk is not compressible to at least 50%, NTFS stores it uncompressed.
+
+Uses LZNT1, a variation of (LZ77)
+
+##### Journaling
+Logs all file system changes in the `$LOGFILE` before applying them.
+- It can detect bad sectors and mark them in `$BadClus`
+- NTFS can recover a corrupted MFT using `$MFTMirr`
+- NTFS uses ACLs to manage permissions
+- Each file stores a `$SECURITY_DESCRIPTOR`
+### Security descriptors
+
+
+```
+Owner: S-1-5-21-3623811015-3361044348-30300820-1001 (User: Alice)
+Group: S-1-5-32-544 (Administrators)
+DACL:
+	Allow: S-1-5-21-3623811015-3361044348-30300820-1001 (Alice) - Full Control
+	Deny: S-1-5-21-3623811015-3361044348-30300820-1002 (Bob) - Read Access
+	Allow: S-1-5-18 (Local System) - Full Control
+SACL:
+	Audit: S-1-5-21-3623811015-3361044348-30300820-1003 (Eve) - Log Failed
+Access
+```
+
+Where DACL = **Discretionary Access Control List** and SACL = **System Access Control List**
 
 
 
@@ -243,3 +333,9 @@ New Technologies File System
 [^2]: Extension (.pdf, .txt) as opposed to format, which specifies the [grammar](Regular%20languages.md) of the file
 
 [^3]: contains information about where to place different parts of the program in memory.
+
+[^4]: contiguous area of storage reserved for a file in a file system, represented as a range of block numbers, or tracks on count key data devices
+
+[^5]: Balanced based on height tree. Nodes can contain multiple keys and pointers. Leaf nodes are the data records, upper nodes only store ketys. Ordered (BST).
+
+[^6]: In the MFT entry straight up.

Operating Systems/Inter-Process Communication.md

@@ -132,6 +132,10 @@ It uses **condition variables** (often with wait and signal[^3]operations) to al
 
 ![|600](Pasted%20image%2020250502180811.png)
 
+
+## Endianness
+![](Pasted%20image%2020250505163335.png)
+
 ---
 
 [^1]: [Context switching](Processes%20and%20Threads.md#Context%20switching)