Dot Hill Systems NEBS Equivalency B. Rust C. Morris P. Bisping R. Mannering V. Orozco 06/15/2009 Dot Hill Systems Confidential

Summary of Equivalency Testing The Dot Hill Systems 2U24 models 2322 (iSCSI), 2522(SAS) and 2722 (FC) have demonstrated NEBS equivalency in all aspects except the 2” drop test which has not been completed. The EMC and Safety testing was equivalent to the NEBS GR-CORE-1089 testing and is therefore compliant to this standard The Environmental testing was equivalent to NEBS GR-CORE-63 testing and is therefore compliant to this standard It is expected that the models 2322, 2522 and 2722 will pass NEBS testing and are NEBS Compliant.

Summary of NEBS Equivalency GR-1089 Test Description NEBS Equivalency Status Notes EMI  DHS internal specifications are the same as NEBS NEBS Lightning and AC Power Fault See details on supporting slide Electrical Safety Bonding and Grounding DC Power Port Tests

Summary of NEBS Equivalency GR-63 Test Description NEBS Equivalency Status Notes Thermal  See details on supporting slide Humidity Altitude Op Random Vibe Op Swept Sine Vibe DHS internal specifications are more stringent than NEBS Op Shock Unpackaged NEBS does not have unpackaged op-shock requirements. DHS internal specifications are more stringent than NEBS

Summary of NEBS Equivalency GR-63 Test Description NEBS Equivalency Status Notes Non-op Shock Unpackaged * DHS non-op shock testing is 15G, 11ms. NEBS requires 2” drop. PSU and similar controllers have passed the NEBS requirements. * 2U-24 chassis is highly leveraged from the 2U12 and is expected to pass further tests. Non-op Shock, Packaged  DHS internal specifications are more stringent than NEBS Random Vibration, Packaged Spatial Requirements This NEBS requirement is not applicable Temperature Margin See details on supporting slide Fan Cooled Equipment PSU and similar controllers have passed this NEBS requirement. The 2U-24 chassis has an identical airflow system

Summary of NEBS Equivalency GR-63 Test Description NEBS Equivalency Status Notes Surface Temperature  The 2U-24 product uses the same PSU and similar controllers to the 5730. This will not be an issue Fire Spread See details on supporting slide Fan Failure PSU have passed NEBS fan failure requirements. Airflow system is identical from the PSU and controller standpoint. Smoke & Self Extinguishment Criteria Needle Flame Airborne Contaminants (mixed flow gas) Airborne Contaminants (hygroscopic dust)

Summary of NEBS Equivalency GR-63 Test Description NEBS Equivalency Status Notes Acoustic Noise  The majority of acoustic noise is from the PSU fans. The 5730 has passed the NEBS requirement with the same PSU. No issue Illumination See details on supporting slide

EMI comparison EMI Testing NEBS Electrostatic Discharge and Electrical Fast Transients (ref. GR-1089-CORE issue 4) Electrostatic Discharge (ESD) 2.1 ±8 kV contact mode discharges ±15 kV air mode discharges Electrical Fast Transient (EFT) 2.2 5 one-minute EFT/Burst applications of each polarity, positive and negative, are applied at: 0.25 kV for Port Types 1 and 2 0.5 kV for AC and DC Ports of network equipment 0.5 kV for Port Types 3 and 4 1 kV for AC and DC Ports NEBS Emission Criteria 3.2 (ref. GR-1089-CORE issue 4) Radiated Emission Criteria 3.2.1 10KHz to 12GHz- Limit FCC part 15 Class A Conducted Emission Criteria for Power Ports 3.2.2 150KHz to 30MHz, Limit Class A Conducted Emission Criteria for Telecommunication Ports 3.2.3 150 KHz to 30MHz, Limit Class A

EMI comparison EMI Testing NEBS Radiated Immunity Criteria 3.3 (ref. GR-1089-CORE issue 4) Electric field of 8.5 V/m Frequency range 0.01 through 10000MHz, Doors Open NEBS Conducted Immunity Criteria 3.3.2 & 3.3.3 (ref. GR-1089-CORE issue 4) Electromagnetic energy is injected longitudinally (common-mode) into each power port and Telecommunications ports: 89 dBμA down to 80.5dBμA from 0.01MHz to 0.15MHz and 80.5 dBμA from 0.15MHz to 30MHz DHS requirements (ref. Report DOTH0078) Radiated Emission Criteria 30MHz to 26GHz, Limit FCC part 15 Class A Conducted Emissions Criteria 150KHz to 30MHz, Limit Class A Conducted Emission Criteria for Telecommunication Ports 150 KHz to 30MHz, Limit Class A Radiated Immunity Criteria Electric field of 10V/m Frequency range 0.08 through 2700MHz, Doors open Conducted Immunity Criteria Electromagnetic Field @3Vrms from 0.15MHz to 80MHz into each power port and Telecommunications ports. Electrostatic Discharge (ESD) ±8 kV contact mode discharges ±15 kV air mode discharges

EMI comparison EMI TESTING Electrical Fast Transient (EFT) 2.2 One-minute EFT Burst applications of each polarity positive and negative are applied at: 0.5kV for Data ports (Ethernet, SAS) 1kV for AC and DC Ports Conclusion – The Dot Hill EMI test criteria is basically identical to the NEBS test criteria. Dot Hill has designed the 2322, 3522 and 2722 using the 5730 as a base line. The same power supplies, which were previously NEBS certified in the 5730, are used, which is the primary component tested in the EMI testing. Dot Hill has passed the ITE EMI testing with no issues. The 2322, 2522 and 2722 will pass the NEBS EMI testing.

Other GR-1089 Tests NEBS Lightning and AC Power Fault First Level Lightning Surge: ±2000 @ 1000A (4) repetitions each polarity Second Level Lightning Surge: ±6000 @ 3000A (1) repetition each polarity AC power fault: 1000Vrms @ 1A, 60 applications The design of the 2322, 2522 and 2722 are the same as the 5730 as far as lightning and AC Power Fault protection, and will pass all NEBS testing. The 5730 is NEBS certified. Electrical Safety The main NEBS criteria is that the product must pass the UL 60950-1 Product safety testing. The 2322, 2522 and 2722 FC were thoroughly tested at UL and passed. The product safety designs for the 2322, 2522, 2722 FC and 5730 are the same. The 5730 is NEBS certified. The 2322, 2522 and 2722 FC will pass all NEBS Electrical Safety testing. Bonding and Grounding The bonding and grounding of the 2322, 2522 and 2722 FC product are the same as the 5730. The 5730 is NEBS certified. The embedded power sources in the 2322, 2522 and 2722 FC product are equivalent to those used in the 5730, and these power sources will pass the short circuit test. The NEBS short circuit testing was conducted on the 2722FC product at Dot Hill and passed. The Bonding and Grounding testing will pass. DC Power Port Tests These tests are conducted on the Power Supplies, which are the same as those used in the model 5730, which is NEBS Certified. This testing will pass.

Thermal Thermal Testing 12 NEBS requirements (ref GR-63-CORE Issue 3) Transportation and Storage - Section 5.1.1; -40ºC – 72 hrs, +70ºC – 72 hrs Operating Temperature and Relative Humidity – Section 5.1.2, shelf level; +55ºC – 16hrs, -5ºC – 16 hrs DHS requirements (DVT test report 874-6994A-3-0 – NTS Labs) Low Temperature, Non Operational (packaged), IEC 60068-2-1; -40ºC for 72 hrs High Temperature, Non Operational (packaged), IEC 60068-2-2; +70ºC for 72 hrs Low Temperature, Operational, IEC 60068-2-1; +5ºC for 8 hrs High Temperature, Operational, IEC 60068-2-2; +40ºC for 16 hrs Low Temperature, Operating Limit, Cold Start; Five cycles to +2ºC for 16 hrs and start DHS requirements (System Thermal Analysis Test report 83-00005517 rev B1 – Dot Hill ) Low Temperature, Operational, 0ºC – 1 hr High Temperature, Operational, +55ºC – 1 hr High Temperature shut-off, +67ºC (ramp 25ºC/hr, from 25ºC to 75ºC) Conclusion – Passed Transportation and Storage testing – same temperature and duration as NEBS Passed Operating Temperature (+55ºC) for 1 hr; will also pass for NEBS 16 hour test Passed Operating Temperature (0ºC) for 1 hr and cold starts at 2ºC after 4 hr soak. Will also pass NEBS -5ºC test which reaches -5ºC after ramping down from 25ºC, since internal temperature rise due to operating heat rise, is equivalent to the cold start test at 2ºC. 12

Thermal Sensors

Humidity Humidity Testing NEBS requirements (ref GR-63-CORE Issue 3) Transportation and Storage - Section 5.1.1; 93% RH @ 40ºC – 96 hrs Operating Temperature and Relative Humidity – Section 5.1.2; 90% RH @ 28ºC – 96hrs DHS requirements (DVT test report 874-6994A-3-0 – NTS Labs) Damp Heat, Non Operational (packaged), IEC 60068-2-56; +40ºC, 93% RH for 96 hrs Damp Heat, Operational, IEC 60068-2-56; +40ºC, 93% RH for 16 hrs Conclusion – Passed Transportation and Storage testing; same temperature and humidity testing parameters as in the NEBS test Passed Operating testing for 16 hr at a higher temperature; will pass for 96 hour NEBS test. 14

Altitude Altitude Testing NEBS requirements (ref GR-63-CORE Issue 3), Operating Altitude – Section 5.1.3 +55ºC 1,800 m (5,904 ft) – 8 hrs (Section 5.1.3 states that increasing the high temperature test from +55°C to +61°C, accounts for the thermal altitude effects at 1,800 m. This equivalence testing is not done by the test lab for products with hard drives, but a pre-test using the 61°C is the method used by manufacturers to show equivalence prior to the actual NEBS testing.) +45ºC 4,000 m (13,120 ft) – 8 hrs DHS requirements (System Thermal Analysis Test report 83-00005517 rev B1 – Dot Hill High Temperature shut-off, +67ºC (ramp 25ºC/hr, from 25ºC to 75ºC) Conclusion – Passed Operating Temperature (67ºC) during ramp test, which is hotter than the altitude equivalent steady state test at 61ºC, which is equivalent to the NEBS 55ºC at 1,800 m (5,904 ft). 15

Operational Random Vibration NEBS requirements (ref GR-63-CORE Issue 3 Section 5.4.1 Zone 4) Frequency Range 0.3 Hz to 50 Hz Peak accel = 5G 2Hz to 5 Hz) ETSI requirements (ref EN 300 019-2-3 V2.2.2 Test spec T3.2) Frequency Range 5Hz to 100Hz PSD= 0.02 m2/s3 ref(0.000208 G2/Hz)) DHS 5Hz to 500Hz 0.21Grms Peak accel = 3.1 G (DHS 83-5059rB1) Conclusion – DHS random vibration specification is more stringent than NEBS and ETSI. NEBS spec is slightly higher between 2Hz and 5Hz. This freq is not an issue for HDD’s Accel Vs Freq Curves

Operational Swept Sine Vibration NEBS requirements (ref GR-63-CORE Issue 3 Section 5.4.2 Zone 4) 0.1 G (0 to peak) 5-100 Hz .1 oct/min ETSI requirements (ref EN 300 019-2-3 V2.2.2 Test spec T3.2) Frequency Range 5Hz to 62Hz limited velocity 5mm/s 62Hz-200 Hz 2m/s2 (ref: 0.204G) DHS see table below Drive Class Frequency Range (Hz) Excitation Level (G0 to peak) Dwell Freq Entry Level 5-500-5 1 oct/min 0.10 NA Nearline 0.15 Enterprise 0.20 Three highest peaks with Q≥2 Conclusion – DHS swept sine requirements are more stringent than NEBS and ETSI.

Operational Shock Operational Shock Testing NEBS has no operational shock requirements ETSI requirements (ref EN 300 019-2-3 V2.2.2 Test spec T3.2) 30 m/s2 (ref 3.06 G) 11ms 3 shocks in each axis DHS (83-5059 rev:B1)5 G, 11ms, ½ sine pulses in the ±X, ±Y and ±Z axes. 10 shock pulses will be administered in each direction, with a pause of 5 seconds between pulses. Conclusion – DHS operational shock requirements are more stringent than NEBS and ETSI.

Non-Op Shock, Unpackaged Non-Operational Shock Testing, Unpackaged NEBS: 25 to <50 kg, 2 inch drop. ETSI: No test. DHS (83-5059 rev:B1) 15 G, 11ms, ½ sine pulses in the ±X, ±Y and ±Z axes. 3 shock pulses will be administered in each direction, with a pause of 5 seconds between pulses. Conclusion – Historically, DHS has not done the NEBS drop test.

Non-Op Shock, Packaged Non-Operational Shock Testing, Packaged NEBS: <40 kg, 19.7 inch drop. (Drop height is derived from ETSI spec in next bullet.) ETSI requirements (ref EN 300 019-2-2 V2.1.2 Test spec T2.2) 20 to <100 kg, .25 m drop (9.84 inches), one fall on each face DHS – Per ISTA 2A except in cases where customer requirements are more stringent. ISTA 2A – <150 lbs, drop height 20" on 1 corner, 3 associated edges, and 6 faces Conclusion – DHS packaged drop testing requirements are more stringent than NEBS and ETSI.

Random Vibration, Packaged Random Vibration Testing, Packaged NEBS: (ref GR-63-CORE Issue 3 Section 5.4.3 Transportation Vibration) 0.01 g2/Hz from 5-20 Hz, -3 dB/Octave from 20-200 Hz for 30 minutes in each axis. Equivalent to 0.782 Grms. This is taken from the ETSI spec. ETSI requirements (ref EN 300 019-2-3 V2.2.2 Test spec T3.2) 1.0 m2/sec3 from 5 to 20 Hz, 0.3 m2/sec3 from 20 to 200 Hz for 30 minutes in each axis. DHS: See PSD curves for horizontal and vertical testing below. Conclusion – The DHS vertical PSD curve is more stringent than NEBS and ETSI.

Other GR-63 Tests Spatial Requirements – These are shelf level products and are not applicable to the spatial criteria.| Temperature Margin – The temperature margin testing starts with the normal maximum +55ºC operating temperature, and then increases the operating temperature first to +60ºC and finally to +65ºC. During EVT temperature testing, the 2722 product quit operating at +67ºC. This product has adequate operating temperature margin to pass this NEBS testing. Fan Cooled Equipment – These products are very similar in airflow design to the model 5730. Both these products and the model 5730 use the same power supplies, which contain the fans for cooling these products. The 5730 passes these NEBS tests. These products will also pass this testing. Surface Temperature – These products ares similar in generated heat to our Model 5730, which passes this testing. These products will also pass this testing.

Other GR-63 Tests Fire Spread – These products were designed to meet this criteria. The chassis is a sheet metal design, and thus encloses any internal burning. These products are very similar to the model 5730, which has passed this testing. All products use the same power supplies and have similar printed wiring boards. The hard drives for this product are 2.5” versus the 5730 which has 3.5” disks. However, the basic combustible materials are the same for all products and these products will pass this testing. Fan Failure –These products use the same power supplies as used on the model 5730. The airflow designs of all products are basically the same. These products were tested for fan failures and passed the testing. The model 5730 passed the NEBS testing. This product will pass the NEBS testing. Smoke and Self-Extinguishment Criteria - These products are designed to meet this criteria. The chassis is a sheet metal design, and thus encloses an internal fire. These products are very similar to the model 5730, which has passed this testing. All products use the same power supplies and have similar printed wiring boards. The hard drives for these products are 2.5” versus the 5730 which has 3.5” disks. However, the basic combustible materials are the same and these products will pass this test.

Other GR-63 Tests Needle Flame – These products were designed to pass this testing. Components were chosen with the required fire burn ratings to pass this testing. Most of the components are the same as those used in the model 5730 which passes this NEBS test. These products will pass this testing. Airborne Contaminants – Mixed Flow Gas - These products are designed to meet this criteria. The product airflow is similar to the model 5730, which has passed this testing. All products use the same power supplies and have similar printed wiring boards. The hard drives for these products are 2.5” versus the 5730 which has 3.5” disks. However, the basic design concepts are the same and therefore these products will pass this testing. Airborne Contaminants – Hygroscopic Dust- These products are designed to meet this criteria. The product airflow is similar to the model 5730, which has passed this testing. All products use the same power supplies and have similar printed wiring boards. The hard drives for this product are 2.5” versus the 5730 which has 3.5” disks. However, the basic design concepts are the same and therefore these products will pass this testing.

Other GR-63 Tests Acoustic Noise – These products have been tested for acoustic noise and meets the NEBS criteria. This product and the model 5730 both use the same power supplies, which is the primary noise source, and the 5730 passes this testing. This product will pass this testing. Illumination – These products are very similar to the model 5730 as far as illumination. The model 5730 passes this testing, and this product will also pass this testing.

Thank You !