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[ts-7000] SSD SATA froze...harbinger to a painful recall similar to TS S

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Subject: [ts-7000] SSD SATA froze...harbinger to a painful recall similar to TS SD Card corruption?
From: "aging_independently" <>
Date: Wed, 01 Dec 2010 18:44:29 -0000


Hi all,

Our TS7800-based product initially used a SD Card for a small database.  Like others here, after weeks of chasing SD Card corruption returns, ultimately we learned the root cause was a not-immediately-fixable issue with the TS7800 hardware. So we quickly (but painfully) redesigned our product to use a SSD SATA for the database instead and recalled all product in the field.

Now, after a few months of service in the field, we just experienced our first SSD SATA failure. Troubleshooting, the SATA SSD drive was not mounted as a device. The mount command did not list /mnt/sda as mounted and a search of /dev/ did not show the sda or sda1 devices, indicating the SATA SSD drive was not available. Software-forced rebooting the SBC did not correct the problem. However power cycling the TS7800 and the OCZSSD2-1VTX30G SSD drive, the system returned to a normal working state. [Unfortunately, we did not yank the SSD out of the system and query with a tool like Crystal Disk.]

I worry that since our product always has lots of serial traffic at same time as database reads/writes (simultaneous serial traffic rumored to be related to SD Card corruption), the SDD somehow got the freeze from the TS7800 hardware or low-level software. [Btw, our life-safety product is fully-protected against sudden power loss (supercap and battery backup).]

Questions:

1. The schematic shows all SATA traffic goes directly through the Marvell chip (no FPGA traffic cop). Are there any special configuration commands needed for SSD SATA (as opposed to generic rotating/non-solid-state hard drives)? [OCZ says "Solid State Drives DO NOT require defragmentation. It may decrease the lifespan of the drive."]

2. OCZ recommends "garbage collection" once a month ... is there a way to do this on the TS7800 running "standard" TS-provided linux?

3.  Has anyone else out there had a SSD SATA failure tethered to a TS7800?

All feedback greatly appreciated ... thanks!



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