X-25 M SSD from Intel:
80GB? Are they selling a 96GB flash drive as 80GB and reserving some space for spare sectors and wear leveling?
There are 10 memory chips on each side (20 total) not counting the controller and dram cache. 20x4 would be 80 so maybe they really have 80GB flash on it and it isn't abnormal to see SSDs that aren't close to a multiple of 32GB.
OK this entire message is data on the mainstream/consumer grade SSDs
The 20 chips are apparently split across channels on the drive controller (2 chips per channel)
10 Parallel Channel Architecture with 50nm MLC ONFI 1.0 NANDhttp://www.intel.com/design/flash/nand/ ... /index.htmhttp://download.intel.com/design/flash/ ... asheet.pdf
Operating Shock 1,000 G/0.5 ms
Operating Temperature 0Â°C to +70Â°C
Product Health Monitoring Self-Monitoring, Analysis and Reporting Technology (SMART) commands, plus additional SSD monitoring
1. 1GB=1,000,000,000 Byte and not all of the memory can be used for data storage.
2. 1 sector = 512Byte
Unformatted Capacity Total User Addressable Sectors in LBA Mode
80 GB 156,301,488
Table 11. Reliability Specifications
Nonrecoverable read errors 1 sector in 1015 bits read, max
Mean Time between Failure (MTBF) 1,200,000 hours
Power On/Off Cycles 50,000 cycles
Minimum Useful Life 5 years
Power On/Off Cycles
Defined as power being removed from the drive, and then restored. Most host systems remove power from the drive when entering suspend and hibernate as well as on a system shutdown.
Minimum Useful Life
A typical client usage of 20 GB writes per day is assumed. Should the host system attempt to exceed 20 GB writes per day by a large margin for an extended period, the drive will enable the endurance management feature to adjust write performance. By efficiently managing performance, this feature enables the device to have, at a minimum, a five year useful life. Under normal operation conditions, the drive will not invoke this feature.
Native Command Queuing
The Intel X18-M/X25-M SATA SSDs support the Native Command Queuing (NCQ) command set, which consists of
â€¢ READ FPDMA QUEUED
â€¢ WRITE FPDMA QUEUED
Note: With a maximum queue depth equal to 31.
Apparently if you use the consumer drive in a server it'll throttle you eventually. Then again how many people write more than 20GB a day on a regular basis? I know I would the first day or two as I installed an OS and some apps but it probably won't kick in until you do that for several days in a row. I suppose reviewers and people that like to do home benchmarking would have to keep that in mind as it might slow down after several days of severe testing.
Anybody know off the top of their head what a typical DVR/PVR setup like a MythTV box would write in a day?