Hello,
I got two units of Netgear Stora MS2110/2000 (same hardware, but 2110 are sold with 1TB drive inside). Second unit had dead flash with almost no good cells left and producing ECC errors, so I decided to replace NAND chip. And now story begins:
- tried to buy same Samsung K9F2G08U0C-SCB0 from Aliexpress - both 5 chips arrived DOA. Symptoms were - no TTL output, no LED lights/blinks, only one chip was recognized only one time from U-Boot via kwboot, but as 1MB/4KB pagesize. So I throw them.
- After few days investigation found that Samsung NAND chips of this type are EOL and it's no more on table for selling. Looked for compatible alternative and based on datasheets decided to order Cypress/Spansion S34ML02G100TFI000. On a paper both chips are similar and should be interchangeable, but when I replaced Samsung one with Spansion one problems began. Symptoms - when I load via kwboot/TTL original u-boot dump, chip is recognized with correct size, page size, eraseblock and so on. I can flash it with orifginal firmware files (nand dumps without ECC and OOB), flashing ends without any errors and complaints, but after reboot unit is completely dead - no TTL output from U-boot, no lights, just a spinning fan. Tried to boot unit via kwboot with original u-boot and unit is booting from NAND, tried to flash Bodhi's 2017.05 U-boot + recovery kernel/rootfs on USB for Stora - same problem - it boots via serial, but not in standalone. At this moment I am bit lost where to look and what to change - not sure if this is a problem of U-Boot/Kernel NAND support or just NAND flash controller is not recognizing NAND chip and refuses to initialize it.
For convenience datasheets are attached. Tomorrow I will get U-boot logs too. I really need advise where to look for clues and will be happy to share any progress which I will gain.
I got two units of Netgear Stora MS2110/2000 (same hardware, but 2110 are sold with 1TB drive inside). Second unit had dead flash with almost no good cells left and producing ECC errors, so I decided to replace NAND chip. And now story begins:
- tried to buy same Samsung K9F2G08U0C-SCB0 from Aliexpress - both 5 chips arrived DOA. Symptoms were - no TTL output, no LED lights/blinks, only one chip was recognized only one time from U-Boot via kwboot, but as 1MB/4KB pagesize. So I throw them.
- After few days investigation found that Samsung NAND chips of this type are EOL and it's no more on table for selling. Looked for compatible alternative and based on datasheets decided to order Cypress/Spansion S34ML02G100TFI000. On a paper both chips are similar and should be interchangeable, but when I replaced Samsung one with Spansion one problems began. Symptoms - when I load via kwboot/TTL original u-boot dump, chip is recognized with correct size, page size, eraseblock and so on. I can flash it with orifginal firmware files (nand dumps without ECC and OOB), flashing ends without any errors and complaints, but after reboot unit is completely dead - no TTL output from U-boot, no lights, just a spinning fan. Tried to boot unit via kwboot with original u-boot and unit is booting from NAND, tried to flash Bodhi's 2017.05 U-boot + recovery kernel/rootfs on USB for Stora - same problem - it boots via serial, but not in standalone. At this moment I am bit lost where to look and what to change - not sure if this is a problem of U-Boot/Kernel NAND support or just NAND flash controller is not recognizing NAND chip and refuses to initialize it.
For convenience datasheets are attached. Tomorrow I will get U-boot logs too. I really need advise where to look for clues and will be happy to share any progress which I will gain.