A quick check of my Intel 520 SSD that running since 2 years on a small cluster.
smartctl -a /dev/sda
=== START OF INFORMATION SECTION ===
Model Family: Intel 520 Series SSDs
Device Model: INTEL SSDSC2CW060A3
Serial Number: CVCV305200NB060AGN
LU WWN Device Id: 5 001517 8f36af9db
Firmware Version: 400i
User Capacity: 60 022 480 896 bytes [60,0 GB]
Sector Size: 512 bytes logical/physical
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0032 100 100 000 Old_age Always - 0
9 Power_On_Hours_and_Msec 0x0032 000 000 000 Old_age Always - 910315h+05m+29.420s
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 13
170 Available_Reservd_Space 0x0033 100 100 010 Pre-fail Always - 0
171 Program_Fail_Count 0x0032 100 100 000 Old_age Always - 0
172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0
174 Unexpect_Power_Loss_Ct 0x0032 100 100 000 Old_age Always - 13
184 End-to-End_Error 0x0033 100 100 090 Pre-fail Always - 0
187 Uncorrectable_Error_Cnt 0x000f 117 117 050 Pre-fail Always - 153797776
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 13
225 Host_Writes_32MiB 0x0032 100 100 000 Old_age Always - 1367528
226 Workld_Media_Wear_Indic 0x0032 100 100 000 Old_age Always - 65535
227 Workld_Host_Reads_Perc 0x0032 100 100 000 Old_age Always - 3
228 Workload_Minutes 0x0032 100 100 000 Old_age Always - 65535
232 Available_Reservd_Space 0x0033 100 100 010 Pre-fail Always - 0
233 Media_Wearout_Indicator 0x0032 093 093 000 Old_age Always - 0
241 Host_Writes_32MiB 0x0032 100 100 000 Old_age Always - 1367528
242 Host_Reads_32MiB 0x0032 100 100 000 Old_age Always - 56808
249 NAND_Writes_1GiB 0x0013 100 100 000 Pre-fail Always - 33624
9 - Power on hours count
Cluster started since 2 years.
170 Available_Reservd_Space
100%
174 - Unexpected power loss
13 => Due to power loss on cluster. Everything has always well restarted. :)
187 - Uncorrectable error count
? Limit Ok
233 Media Wearout Indicator
093 => progressively decrease, I do not know if it's completely reliable, but it is usually a good indicator.
241 - Host Writes 32MiB
1367528 => 42 Tb written by host This correspond to 60 GB per days for 3 osd. This seems normal.
249 - NAND Writes 1GiB
33624 => 33 Tb written on Nand write amplification = 0.79 That is pretty good.
The drive is a 60.0 GB. This make each LBA written about 560 times.
For clusters with a little more load, Intel DC S3700 models remains my favorite, but in my case the Intel 520 do very well their job.