On Wed, 2019-11-13 at 04:06 -0800, Bruce Ferrell wrote: > Well, I was thinking more along the lines of the "early" failure rate > for SSD and not so much the convenience of a thing as small as my baby > finger nail with insane amounts of > storage. I have active and still in use rotational media from the > 90's. SSD just can't do that and flash... We don't need to go into > it. That's what started this thread.
There is a big difference between SD cards, USB sticks and real SSDs too. And there is another big difference between consumer SSD and Enterprise gear. Here is some real world data. Drive has been in pretty much constant use in production at a public library running the online catalog and in house cataloging / automation / etc. since 2011. === START OF INFORMATION SECTION === Model Family: Intel X25-M SSD Device Model: INTEL SSDSA2M160G2GN Serial Number: CVPO0510036E160AGN Firmware Version: 2CV102HD User Capacity: 160,041,885,696 bytes Device is: In smartctl database [for details use: -P show] ATA Version is: 7 ATA Standard is: ATA/ATAPI-7 T13 1532D revision 1 Local Time is: Thu Nov 14 15:09:55 2019 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 3 Spin_Up_Time 0x0020 100 100 000 Old_age Offline - 0 4 Start_Stop_Count 0x0030 100 100 000 Old_age Offline - 0 5 Reallocated_Sector_Ct 0x0032 100 100 000 Old_age Always - 21 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 71816 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 148 192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 101 225 Host_Writes_Count 0x0030 200 200 000 Old_age Offline - 414459 226 Load-in_Time 0x0032 100 100 000 Old_age Always - 184 227 Torq-amp_Count 0x0032 100 100 000 Old_age Always - 0 228 Power-off_Retract_Count 0x0032 100 100 000 Old_age Always - 3027407118 232 Available_Reservd_Space 0x0033 099 099 010 Pre-fail Always - 0 233 Media_Wearout_Indicator 0x0032 096 096 000 Old_age Always - 0 184 End-to-End_Error 0x0033 100 100 099 Pre-fail Always - 0 SMART Error Log Version: 1 No Errors Logged So yeah I trust SSDs now in production workloads. It is in a RAID1 though so trust but verify is still the watchword. There are six of these drives in the three servers making up our Evergreen install, all bought at the same time and all still going strong. Unless something unusual happens they are more likely to be taken out of service for being too small than becoming unreliable.
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