Editing Partitions

See also [[Devices#Disk_Device_Listing|Disk Devices]], [[Files on the PS4]] and [https://www.psdevwiki.com/ps5/Partitions PS5 Partitions].

== Table ==

* Internal HDD is identified by the device id “da0”.
* USB Storage is identified by the device id “da1”.
* USB Extended Storage is identified by the device id “es0”.

{| class="wikitable"
|-
! Device name !! Partition name !! Filesystem !! Encryption Type !! Permissions !! Notes
|-
| da0x0 || preinst || msdosfs || SAMU HDD Key || || Preinstalled data: fonts, IME dictionaries, login and home menu background music
|-
| da0x1 || preinst2 || msdosfs || SAMU HDD Key || || Preinstalled data: The Playroom game package
|-
| da0x2 || eap_kern || raw || EAP Kernel Key from EAP KBL (not per-console, in sflash or PUP) || || Raw partition decrypted and uncompressed by EAP KBL to EAP DDR3 RAM.
|-
| da0x3 || eap_vsh || msdosfs || EAP HDD Key (per-console, in sflash) || ||
|-
| da0x4 || system || msdosfs/exfat || SAMU HDD Key || ||
|-
| da0x4b || system(b) || msdosfs/exfat || SAMU HDD Key || ||
|-
| da0x5 || system_ex || msdosfs/exfat || SAMU HDD Key || ||
|-
| da0x5b || system_ex(b) || msdosfs/exfat || SAMU HDD Key || ||
|-
| da0x6 || old swap || swapfs || versioned_key (not per-console, in AMD x86 kernel) + OpenPsId (per-console, encrypted in sflash) || ||
|-
| da0x6x0 || new swap || swapfs || ?same as old swap? || ||
|-
| da0x6x1 || kernel log || ?raw or swapfs? || ?same as old swap? || ||
|-
| da0x6x2 || user log || ?raw or swapfs? || ?same as old swap? || ||
|-
| da0x7 || hiber || ? || ? || || May stand for hibernation so probably used for suspend mode.
|-
| da0x8 || app_tmp || ufs || SAMU HDD Key || ||
|-
| da0x9 || system_data || ufs || SAMU HDD Key || ||
|-
| da0x10 || rec_game || ? || ? || ||
|-
| da0x11 || rec_share || ? || ? || ||
|-
| da0x12 || update || msdosfs || EAP HDD Key (per-console, in sflash) || RW ||
|-
| da0x13 || user || ufs || EAP HDD Key (per-console, in sflash) || RW ||
|-
| da0x14 || eap_user || ufs || EAP HDD Key (per-console, in sflash) || RW ||
|-
| da0x15 || app_reserved || ufs || ? || || ?dmem swap?
|-
| da1 || ? || ?raw? || Plaintext || RW || USB Storage. There can be up to 8 USB storage devices simultaneously mounted to /mnt/usb0, ..., /mnt/usb7 so maybe da1 is not the only device for USB. See https://docs.freebsd.org/en/books/handbook/disks/#usb-disks.
|-
| da1s?0? || ? || msdosfs/exfat || Plaintext || RW || USB Storage first partition. There can be up to 8 USB storage devices simultaneously mounted to /mnt/usb0, ..., /mnt/usb7 so maybe da1 is not the only device for USB. See https://docs.freebsd.org/en/books/handbook/disks/#usb-disks.
|-
| es0 || ext_hdd || ?ufs? || PS4-PS5 USB Extended Storage Key (not per-console) + per-HDD seed (not per-console) || RW || [[USB Extended Storage]]. Only present since System Software 4.50.
|}

== HDD Partitions ==

=== Linux Disk Information ===

<div style="float:right">[[File:PS4 500GB HDD as seen in Windows XP.png|200px|thumb|left|PS4 500GB HDD as seen with "GPT Protective Partition" in Windows XP/embedded/2003 32bit/x86]]<br />[[File:Partitions.png|200px|thumb|left|PS4 partitions as seen in 64-bit version of Windows XP/2003/Vista/2008/7/8/10]]</div>
{| class="wikitable sortable"
|-
! {{numero}} !! <abbr title="Windows partition number">Part</abbr> !! device file !! <!--// nikitis //-->[[Z5K500]]<br />size !! <!--// euss //-->[[ST500LM012]]<br />size !! in bytes !! type !! remarks
|-
| {{sort|01|1}} || {{sort|10|10}} || {{sort|17|/dev/sdc17}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>80dd49e3-a985-4887-81de-1daca47aed90</code> || app_tmp
|-
| {{sort|02|2}} || {{sort|15|15}} || {{sort|31|/dev/sdc31}} || align=right | 16 GiB || align=right | {{nobreak|16 GiB}} || align=right | {{nobreak|{{nts|17179869184}}}} || <code>3ef7290a-de81-4887-a11f-46fba765c71c</code> || app_reserved
|-
| {{sort|03|3}} || {{sort|13|13}} || {{sort|27|/dev/sdc27}} || align=right | 420.12 GiB || align=right | {{nobreak|420.120117188 GiB}} || align=right | {{nobreak|{{nts|451100540928}}}} || <code>c638477a-e002-4b57-a454-a27fb63a33a8</code> || user
|-
| {{sort|04|4}} || {{sort|09|9}} || {{sort|13|/dev/sdc13}} || align=right | 8 GiB || align=right | {{nobreak|8 GiB}} || align=right | {{nobreak|{{nts|8589934592}}}} || <code>76a9a5b4-44b0-472a-bde3-3107472adee2</code> || old swap 
|-
| {{sort|05|5}} || {{sort|05|5}} || {{sort|09|/dev/sdc9}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>757a614b-6179-5361-6b61-6b6968617261</code> || system
|-
| {{sort|06|6}} || {{sort|06|6}} || {{sort|10|/dev/sdc10}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>757a614b-6179-5361-6b61-6b6968617261</code> || system(b)
|-
| {{sort|07|7}} || {{sort|07|7}} || {{sort|11|/dev/sdc11}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>dc85025f-a694-4109-be44-fa0c063e8b81</code> || system_ex
|-
| {{sort|08|8}} || {{sort|08|8}} || {{sort|12|/dev/sdc12}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>dc85025f-a694-4109-be44-fa0c063e8b81</code> || system_ex(b)
|-
| {{sort|09|9}} || {{sort|11|11}} || {{sort|19|/dev/sdc19}} || align=right | 8 GiB || align=right | {{nobreak|8 GiB}} || align=right | {{nobreak|{{nts|8589934592}}}} || <code>a71ff62d-1421-4dd9-935d-25dabd81bec5</code> || system_data
|-
| {{sort|10|A}} || {{sort|01|1}} || {{sort|01|/dev/sdc1}} || align=right | 512 MiB || align=right | {{nobreak|512 MiB}} || align=right | {{nobreak|{{nts|536870912}}}} || <code>17800f17-b9e1-425d-b937-0119a0813172</code> || preinst
|-
| {{sort|11|B}} || {{sort|02|2}} || {{sort|03|/dev/sdc3}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>ccb52e94-ebef-48c4-a195-9e2da5b0292c</code> || preinst2
|-
| {{sort|12|C}} || {{sort|03|3}} || {{sort|05|/dev/sdc5}} || align=right | 16 MiB || align=right | {{nobreak|16 MiB}} || align=right | {{nobreak|{{nts|16777216}}}} || <code>145268bf-63ad-47c1-9378-9aacd9beed7c</code> || eap_kern
|-
| {{sort|13|D}} || {{sort|04|4}} || {{sort|07|/dev/sdc7}} || align=right | 128 MiB || align=right | {{nobreak|128 MiB}} || align=right | {{nobreak|{{nts|134217728}}}} || <code>6e0c5310-8445-4066-b571-9b65fdb75935</code> || eap_vsh
|-
| {{sort|14|E}} || {{sort|14|14}} || {{sort|29|/dev/sdc29}} || align=right | 1 GiB || align=right | {{nobreak|1 GiB}} || align=right | {{nobreak|{{nts|1073741824}}}} || <code>21e4dfb4-0040-4934-a037-ea9dc058eea6</code> || eap_user
|-
| {{sort|15|F}} || {{sort|12|12}} || {{sort|25|/dev/sdc25}} || align=right | 6 GiB || align=right | {{nobreak|6 GiB}} || align=right | {{nobreak|{{nts|6442450944}}}} || <code>fdb5ede1-73c3-4c43-8c5b-2d3dcfcddff8</code> || update
|-
|}

'''Note:''' A raw dump of a 500 GB HDD from a never booted PS4 would take 500 GB ({{nts|500107861504}} bytes), which can be compressed to around 1.17 GB ({{nts|1168407328}} bytes) using the 7z algorithm. See [[ST500LM012]].

=== Cygwin Disk Information ===

{| class="wikitable sortable"
! Device !! Size !! Remarks !! Crypto
|-
| /dev/sdb1 || 512MiB || preinst || samu
|-
| /dev/sdb2 || 1GiB || preinst2 || samu
|-
| /dev/sdb3 || 16MiB || eap_kern || static 
|-
| /dev/sdb4 || 128MiB || eap_vsh || eap
|-
| /dev/sdb5 || 1GiB || system b || samu
|-
| /dev/sdb6 || 1GiB || system || samu
|-
| /dev/sdb7 || 1GiB || system_ex b || samu
|-
| /dev/sdb8 || 1GiB || system_ex || samu
|-
| /dev/sdb9 || 8 GiB || old swap || static + psid
|-
| /dev/sdb10 || 1 GiB || app_tmp || samu
|-
| /dev/sdb11 || 8 GiB || system_data || samu
|-
| /dev/sdb12 || 6 GiB || update || eap
|-
| /dev/sdb13 || remaining GiB || user || eap
|-
| /dev/sdb14 || 1 GiB || eap_user || eap
|-
| /dev/sdb15 || 16 GiB || app || samu
|-
|}

=== PS4 HDD partitions statistics logs ===

From SceShellCore logs of a 5.05 PS4 TestKit DUH-T1200 when suspending, with stock 500GB HDD and USB Extended Storage:
<pre>
[SceShellCore][StorageStatsReport] HDD partition [WRITE] :
da0x4           (system      ): bytes:           0B, transfer:            0
da0x4b          (system(b)   ): bytes:      1.11GiB, transfer:         9068
da0x5           (system_ex   ): bytes:           0B, transfer:            0
da0x5b          (system_ex(b)): bytes:      1.04GiB, transfer:         8543
da0x6           (old swap    ): bytes:    705.43MiB, transfer:        17749
da0x8           (app_tmp     ): bytes:     35.26MiB, transfer:          880
da0x9           (system_data ): bytes:     41.48GiB, transfer:      1741368
da0x12          (update      ): bytes:      6.83GiB, transfer:        58112
da0x13          (user        ): bytes:     68.33GiB, transfer:      2180231
da0x14          (eap_user    ): bytes:      6.79MiB, transfer:         1403
da0x6x0         (new swap    ): bytes:    703.02MiB, transfer:        12979
da0x6x1         (kernel log  ): bytes:    654.00KiB, transfer:         1264
da0x6x2         (user log    ): bytes:      1.77MiB, transfer:         3506
es0.crypt       (ext_hdd     ): bytes:     50.37MiB, transfer:         1022
</pre>

From SceShellCore logs of a 5.05 PS4 TestKit DUH-T1200 when suspending, after swapping HDD to a 512GB SSD, reinstalling firmware and reinitializing.
<pre>
[SceShellCore][StorageStatsReport] HDD partition [WRITE] :
da0x4           (system      ): bytes:           0B, transfer:            0
da0x4b          (system(b)   ): bytes:           0B, transfer:            0
da0x5           (system_ex   ): bytes:           0B, transfer:            0
da0x5b          (system_ex(b)): bytes:           0B, transfer:            0
da0x6           (old swap    ): bytes:    182.00KiB, transfer:          352
da0x8           (app_tmp     ): bytes:           0B, transfer:            0
da0x9           (system_data ): bytes:      2.04GiB, transfer:        85198
da0x12          (update      ): bytes:           0B, transfer:            0
da0x13          (user        ): bytes:    233.85MiB, transfer:         8575
da0x14          (eap_user    ): bytes:    544.00KiB, transfer:          129
da0x6x0         (new swap    ): bytes:     16.00KiB, transfer:           32
da0x6x1         (kernel log  ): bytes:           0B, transfer:            0
da0x6x2         (user log    ): bytes:    166.00KiB, transfer:          320
</pre>

* These displayed sizes are the written sizes since the last time the storage statistics were reset.
* Storage statistics are apparently reset during a System Software update.
* Storage statistics are maybe stored in a file on the internal HDD.
* (b) stands for "backup" which is an inactive partition used when System Software update fails.

== Mountpoints ==

;Host devices:
* APP_HOME (DATA)
* APP_HOME (HOST)

=== SceSysCore nmount / nmount_ufs ===

{| class="wikitable sortable"
|-
! module !! type !! source !! destination
|-
| SceSysCore mini || nmount || /dev/da0x4.crypt || /system
|-
| SceSysCore mini || nmount || /dev/da0x5.crypt || /system_ex
|-
| SceSysCore mini || nmount_ufs || /dev/da0x9.crypt || /system_data
|-
| SceSysCore mini || nmount_ufs || /dev/da0x13.crypt || /user
|-
| SceSysCore mini || nmount_ufs || /dev/da0x14.crypt || /eap_user
|-
| SceSysCore mini || mount || /dev/da0x12.crypt || /update
|-
| SceSysCore mini || nmount || /dev/da0x0.crypt || /preinst
|-
| SceSysCore mini || nmount || /dev/da0x1.crypt || /preinst2
|-
| SceSysCore || nmount || /data || /user/data
|-
|  || ?nmount_ufs? || /dev/es0.crypt || ?/ext_hdd?
|-
|  || ?nmount? || /dev/da1s1 || /mnt/usb0
|}

=== SceSysCore scheduler device ===

{| class="wikitable sortable"
|-
! module !! scheduler !! source !! destination
|-
| SceSysCore || GEOM I/O scheduler || is || da0 / da0.sched
|-
| SceSysCore || BD scheduler || bd_sched || cd0 / cd0.sched (/mnt/disc0)
|}

== Partitions mounted on boot ==

From logs of a 5.05 PS4 TestKit CUH-12xx during boot:
<pre>
[SceSysCore mini] nmount /dev/da0x4.crypt to /system
[SceSysCore mini] nmount /dev/da0x5.crypt to /system_ex
[SceSysCore mini] nmount_ufs /dev/da0x9.crypt to /system_data
[SceSysCore mini] nmount_ufs /dev/da0x14.crypt to /eap_user
[SceSysCore mini] nmount /dev/da0x12.crypt to /update
[SceSysCore mini] nmount /dev/da0x0.crypt to /preinst
[SceSysCore mini] nmount /dev/da0x1.crypt to /preinst2
[SceSysCore] nmount /data to /user/data
</pre>

== Files on the PS4 ==

''Main article: [[Files on the PS4]]''


{{Reverse Engineering}}
<noinclude>[[Category:Main]]</noinclude>