NOW ONTO THE BAD NEWS
There are reports of this bricking Slim consoles, do not attempt to downgrade a Slim console with this method. Older Fat PS3's are reporting no issues. Also, after downgrading to 3.41 with this method, your PS3 will think its a 3.56 console. Once on 3.41 it is recommended that you then downgrade the traditional way to 3.15 firmware, and then upgrade the traditional way to 3.41 official firmware.
Update: Unconfirmed - slims with firmware version 3.41 or below from factory will downgrade fine.
USE AT YOUR OWN RISK
Download: Lv2diag_355.zip (539.48 KB)
Download: Downgrade.rar (167.07 MB)
*UPDATED LINKS: Download
Tutorial: http://psgroove.com/showthread.php?7...41-and-Earlier
DO NOT ATTEMPT TO DOWNGRADE A SLIM UNIT WITH THESE FILES YOU WILL BRICK IT!!!
Originally Posted by solidpsycho
SONY! Re-Emberse me for taking the Other OS away from me.
Log: Notice "os version = 03.4100" 8 lines from the bottom.
manufacturing updating start PackageName = /dev_usb000/PS3UPDAT.PUP settle polling interval success vflash is disabled... boot from nand flash... creating flash regions... create storage region: (region id = 2) format partition: (region_id = 2, CELL_FS_IOS:BUILTIN_FLSH1, CELL_FS_FAT) create storage region: (region id = 3) format partition: (region_id = 3, CELL_FS_IOS:BUILTIN_FLSH2, CELL_FS_FAT) create storage region: (region id = 4) format partition: (region_id = 4, CELL_FS_IOS:BUILTIN_FLSH3, CELL_FS_FAT) create storage region: (region id = 5) create storage region: (region id = 6) Initializing taking a while... start Updating Proccess Initialize elapsed time = 177 msec check UPL Check UPL elapsed time = 97 msec check Package Size get package size elapsed time = 9 msec start Updating Package Update packages num = 28 Update packages total size = 160291533 Update Package Revoke list read package revoke list package (576 bytes) elapsed = 66 msec update package revoke list elapsed = 112 msec Update Package Revoke list done(0x8002f000) Update Core OS Package read core os package (5182208 bytes) elapsed = 678 msec update core os package elapsed = 1837 msec Update Core OS Package done(0x8002f000) Update VSH Package sys_memory_container_create() success(id = 0xc0effffe) Update VSH's package : 1/22 read vsh package (1841 bytes) elapsed = 18 msec decrypt and verify vsh package elapsed = 27 msec write vsh package elapsed = 7968 msec compare vsh package elapsed = 0 msec Update VSH's package : 2/22 read vsh package (4779240 bytes) elapsed = 616 msec decrypt and verify vsh package elapsed = 305 msec write vsh package elapsed = 2757 msec compare vsh package elapsed = 489 msec Update VSH's package : 3/22 read vsh package (1927089 bytes) elapsed = 258 msec decrypt and verify vsh package elapsed = 129 msec write vsh package elapsed = 680 msec compare vsh package elapsed = 182 msec Update VSH's package : 4/22 read vsh package (5498561 bytes) elapsed = 710 msec decrypt and verify vsh package elapsed = 344 msec write vsh package elapsed = 3384 msec compare vsh package elapsed = 558 msec Update VSH's package : 5/22 read vsh package (2010269 bytes) elapsed = 275 msec decrypt and verify vsh package elapsed = 138 msec write vsh package elapsed = 1028 msec compare vsh package elapsed = 207 msec Update VSH's package : 6/22 read vsh package (25301 bytes) elapsed = 25 msec decrypt and verify vsh package elapsed = 29 msec write vsh package elapsed = 1454 msec compare vsh package elapsed = 10 msec Update VSH's package : 7/22 read vsh package (7663270 bytes) elapsed = 988 msec decrypt and verify vsh package elapsed = 393 msec write vsh package elapsed = 15190 msec compare vsh package elapsed = 587 msec Update VSH's package : 8/22 read vsh package (10258879 bytes) elapsed = 1335 msec decrypt and verify vsh package elapsed = 287 msec write vsh package elapsed = 16220 msec compare vsh package elapsed = 642 msec Update VSH's package : 9/22 read vsh package (8773195 bytes) elapsed = 1138 msec decrypt and verify vsh package elapsed = 244 msec write vsh package elapsed = 7000 msec compare vsh package elapsed = 512 msec Update VSH's package : 10/22 read vsh package (8827678 bytes) elapsed = 1145 msec decrypt and verify vsh package elapsed = 324 msec write vsh package elapsed = 11278 msec compare vsh package elapsed = 619 msec Update VSH's package : 11/22 read vsh package (6182668 bytes) elapsed = 825 msec decrypt and verify vsh package elapsed = 209 msec write vsh package elapsed = 2076 msec compare vsh package elapsed = 441 msec Update VSH's package : 12/22 read vsh package (10251215 bytes) elapsed = 1331 msec decrypt and verify vsh package elapsed = 259 msec write vsh package elapsed = 3966 msec compare vsh package elapsed = 584 msec Update VSH's package : 13/22 read vsh package (10187344 bytes) elapsed = 1327 msec decrypt and verify vsh package elapsed = 264 msec write vsh package elapsed = 6108 msec compare vsh package elapsed = 591 msec Update VSH's package : 14/22 read vsh package (10381187 bytes) elapsed = 1354 msec decrypt and verify vsh package elapsed = 265 msec write vsh package elapsed = 5917 msec compare vsh package elapsed = 604 msec Update VSH's package : 15/22 read vsh package (9899962 bytes) elapsed = 1324 msec decrypt and verify vsh package elapsed = 265 msec write vsh package elapsed = 7215 msec compare vsh package elapsed = 585 msec Update VSH's package : 16/22 read vsh package (8210627 bytes) elapsed = 1086 msec decrypt and verify vsh package elapsed = 206 msec write vsh package elapsed = 5136 msec compare vsh package elapsed = 485 msec Update VSH's package : 17/22 read vsh package (10382360 bytes) elapsed = 1363 msec decrypt and verify vsh package elapsed = 269 msec write vsh package elapsed = 6811 msec compare vsh package elapsed = 682 msec Update VSH's package : 18/22 read vsh package (9649989 bytes) elapsed = 1288 msec decrypt and verify vsh package elapsed = 372 msec write vsh package elapsed = 35307 msec compare vsh package elapsed = 1052 msec Update VSH's package : 19/22 read vsh package (7751745 bytes) elapsed = 1040 msec decrypt and verify vsh package elapsed = 354 msec write vsh package elapsed = 26124 msec compare vsh package elapsed = 931 msec Update VSH's package : 20/22 read vsh package (8165430 bytes) elapsed = 1091 msec decrypt and verify vsh package elapsed = 371 msec write vsh package elapsed = 12873 msec compare vsh package elapsed = 864 msec Update VSH's package : 21/22 read vsh package (8287111 bytes) elapsed = 1111 msec decrypt and verify vsh package elapsed = 353 msec write vsh package elapsed = 21142 msec compare vsh package elapsed = 937 msec Update VSH's package : 22/22 read vsh package (5315230 bytes) elapsed = 749 msec decrypt and verify vsh package elapsed = 227 msec write vsh package elapsed = 1840 msec compare vsh package elapsed = 456 msec Update VSH Package done(0x8002f000) Bul-ray Disc Player Revoke Bul-ray Disc Player Revoke done(0x8002f000) Update Program Revoke list read program revoke list package (736 bytes) elapsed = 67 msec update program revoke list elapsed = 323 msec Update Program Revoke list done(0x8002f000) move_2block_status_into_the_region(): region id = 3 rewrite_region() region id = 0x3, start_lba = 0x0, end_lba = 0x4000 rewrite region done (ret = 0x8002f000) rewrite region elapsed time = 1198 msec touch_1st_sector_in_block() region id = 0x3, start_lba = 0x0, end_lba = 0x4000 touch_1st_sector() done (ret = 0x8002f000) touch_1st_sector() elapsed time = 1320 msec rewrite_region() region id = 0x3, start_lba = 0x0, end_lba = 0x4000 rewrite region done (ret = 0x8002f000) rewrite region elapsed time = 1200 msec Update BD firmware Update BD firmware done(0x8002f000) Update Multi-Card controller firmware read MCC package (28636 bytes) elapsed = 69 msec update MCC elapsed = 5027 msec Update Multi-Card controller firmware done(0x8002f000) Update BlueTooth firmware read BT package (644322 bytes) elapsed = 104 msec update BT elapsed = 60 msec Update BlueTooth firmware done(0x8002f000) Update System controller firmware read SC patch package (4864 bytes) elapsed = 79 msec read SC patch package (4864 bytes) elapsed = 67 msec Update System controller firmware done(0x8002f000) update package elapsed time = 255949 msec post processiong... post processiong done cleanup update status (ret = 0) os version = 03.4100 build_version = 45039,20100721 region of core os package = 0x40000000 build_target = CEX-ww build target id = 0x83 manufacturing updating SUCCESS(0x8002f000) set product mode (ret = 0) Total Elapsed time = 258865 msec






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