Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- root@box1 [~]# lsblk | awk '/^sd/ {print $1}' | while read line ; do echo -e "============= /dev/$line =============" ; smartctl -x /dev/$line ; done
- ============= /dev/sda =============
- smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-56-generic] (local build)
- Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
- === START OF INFORMATION SECTION ===
- Device Model: HGST HUS726T4TALA6L1
- Serial Number: V6H03M0S
- LU WWN Device Id: 5 000cca 097ce2511
- Firmware Version: VLGNX41C
- User Capacity: 4,000,787,030,016 bytes [4.00 TB]
- Sector Size: 512 bytes logical/physical
- Rotation Rate: 7200 rpm
- Form Factor: 3.5 inches
- Device is: Not in smartctl database [for details use: -P showall]
- ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4
- SATA Version is: SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
- Local Time is: Tue Feb 2 15:39:46 2021 CST
- SMART support is: Available - device has SMART capability.
- SMART support is: Enabled
- AAM feature is: Unavailable
- APM level is: 254 (maximum performance)
- Rd look-ahead is: Enabled
- Write cache is: Enabled
- DSN feature is: Unavailable
- ATA Security is: Disabled, NOT FROZEN [SEC1]
- Wt Cache Reorder: Enabled
- === START OF READ SMART DATA SECTION ===
- SMART overall-health self-assessment test result: PASSED
- General SMART Values:
- Offline data collection status: (0x82) Offline data collection activity
- was completed without error.
- Auto Offline Data Collection: Enabled.
- Self-test execution status: ( 0) The previous self-test routine completed
- without error or no self-test has ever
- been run.
- Total time to complete Offline
- data collection: ( 87) seconds.
- Offline data collection
- capabilities: (0x5b) SMART execute Offline immediate.
- Auto Offline data collection on/off support.
- Suspend Offline collection upon new
- command.
- Offline surface scan supported.
- Self-test supported.
- No Conveyance Self-test supported.
- Selective Self-test supported.
- SMART capabilities: (0x0003) Saves SMART data before entering
- power-saving mode.
- Supports SMART auto save timer.
- Error logging capability: (0x01) Error logging supported.
- General Purpose Logging supported.
- Short self-test routine
- recommended polling time: ( 2) minutes.
- Extended self-test routine
- recommended polling time: ( 543) minutes.
- SCT capabilities: (0x003d) SCT Status supported.
- SCT Error Recovery Control supported.
- SCT Feature Control supported.
- SCT Data Table supported.
- SMART Attributes Data Structure revision number: 16
- Vendor Specific SMART Attributes with Thresholds:
- ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
- 1 Raw_Read_Error_Rate PO-R-- 100 100 016 - 0
- 2 Throughput_Performance P-S--- 128 128 054 - 108
- 3 Spin_Up_Time POS--- 179 179 024 - 243 (Average 229)
- 4 Start_Stop_Count -O--C- 100 100 000 - 37
- 5 Reallocated_Sector_Ct PO--CK 100 100 005 - 0
- 7 Seek_Error_Rate PO-R-- 100 100 067 - 0
- 8 Seek_Time_Performance P-S--- 128 128 020 - 18
- 9 Power_On_Hours -O--C- 098 098 000 - 15530
- 10 Spin_Retry_Count PO--C- 100 100 060 - 0
- 12 Power_Cycle_Count -O--CK 100 100 000 - 37
- 192 Power-Off_Retract_Count -O--CK 100 100 000 - 668
- 193 Load_Cycle_Count -O--C- 100 100 000 - 668
- 194 Temperature_Celsius -O---- 187 187 000 - 32 (Min/Max 18/46)
- 196 Reallocated_Event_Count -O--CK 100 100 000 - 0
- 197 Current_Pending_Sector -O---K 100 100 000 - 0
- 198 Offline_Uncorrectable ---R-- 100 100 000 - 0
- 199 UDMA_CRC_Error_Count -O-R-- 200 200 000 - 0
- ||||||_ K auto-keep
- |||||__ C event count
- ||||___ R error rate
- |||____ S speed/performance
- ||_____ O updated online
- |______ P prefailure warning
- General Purpose Log Directory Version 1
- SMART Log Directory Version 1 [multi-sector log support]
- Address Access R/W Size Description
- 0x00 GPL,SL R/O 1 Log Directory
- 0x01 SL R/O 1 Summary SMART error log
- 0x02 SL R/O 1 Comprehensive SMART error log
- 0x03 GPL R/O 1 Ext. Comprehensive SMART error log
- 0x04 GPL R/O 256 Device Statistics log
- 0x04 SL R/O 255 Device Statistics log
- 0x06 SL R/O 1 SMART self-test log
- 0x07 GPL R/O 1 Extended self-test log
- 0x08 GPL R/O 2 Power Conditions log
- 0x09 SL R/W 1 Selective self-test log
- 0x0c GPL R/O 688 Pending Defects log
- 0x10 GPL R/O 1 NCQ Command Error log
- 0x11 GPL R/O 1 SATA Phy Event Counters log
- 0x12 GPL R/O 1 SATA NCQ Non-Data log
- 0x13 GPL R/O 1 SATA NCQ Send and Receive log
- 0x15 GPL R/W 1 Rebuild Assist log
- 0x21 GPL R/O 1 Write stream error log
- 0x22 GPL R/O 1 Read stream error log
- 0x24 GPL R/O 256 Current Device Internal Status Data log
- 0x25 GPL R/O 256 Saved Device Internal Status Data log
- 0x30 GPL,SL R/O 9 IDENTIFY DEVICE data log
- 0x80-0x9f GPL,SL R/W 16 Host vendor specific log
- 0xe0 GPL,SL R/W 1 SCT Command/Status
- 0xe1 GPL,SL R/W 1 SCT Data Transfer
- SMART Extended Comprehensive Error Log Version: 1 (1 sectors)
- No Errors Logged
- SMART Extended Self-test Log Version: 1 (1 sectors)
- Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
- # 1 Short offline Completed without error 00% 28 -
- # 2 Short offline Completed without error 00% 25 -
- # 3 Short offline Completed without error 00% 25 -
- # 4 Short offline Completed without error 00% 8 -
- # 5 Short offline Completed without error 00% 8 -
- # 6 Short offline Completed without error 00% 5 -
- # 7 Short offline Completed without error 00% 4 -
- # 8 Short offline Completed without error 00% 0 -
- SMART Selective self-test log data structure revision number 1
- SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
- 1 0 0 Not_testing
- 2 0 0 Not_testing
- 3 0 0 Not_testing
- 4 0 0 Not_testing
- 5 0 0 Not_testing
- Selective self-test flags (0x0):
- After scanning selected spans, do NOT read-scan remainder of disk.
- If Selective self-test is pending on power-up, resume after 0 minute delay.
- SCT Status Version: 3
- SCT Version (vendor specific): 256 (0x0100)
- Device State: Active (0)
- Current Temperature: 32 Celsius
- Power Cycle Min/Max Temperature: 29/34 Celsius
- Lifetime Min/Max Temperature: 18/46 Celsius
- Under/Over Temperature Limit Count: 0/0
- SCT Temperature History Version: 2
- Temperature Sampling Period: 1 minute
- Temperature Logging Interval: 1 minute
- Min/Max recommended Temperature: 0/60 Celsius
- Min/Max Temperature Limit: -40/70 Celsius
- Temperature History Size (Index): 128 (78)
- Index Estimated Time Temperature Celsius
- 79 2021-02-02 13:32 32 *************
- ... ..( 12 skipped). .. *************
- 92 2021-02-02 13:45 32 *************
- 93 2021-02-02 13:46 31 ************
- 94 2021-02-02 13:47 32 *************
- ... ..( 36 skipped). .. *************
- 3 2021-02-02 14:24 32 *************
- 4 2021-02-02 14:25 31 ************
- ... ..( 15 skipped). .. ************
- 20 2021-02-02 14:41 31 ************
- 21 2021-02-02 14:42 32 *************
- 22 2021-02-02 14:43 31 ************
- 23 2021-02-02 14:44 32 *************
- ... ..( 32 skipped). .. *************
- 56 2021-02-02 15:17 32 *************
- 57 2021-02-02 15:18 33 **************
- ... ..( 12 skipped). .. **************
- 70 2021-02-02 15:31 33 **************
- 71 2021-02-02 15:32 32 *************
- ... ..( 6 skipped). .. *************
- 78 2021-02-02 15:39 32 *************
- SCT Error Recovery Control:
- Read: Disabled
- Write: Disabled
- Device Statistics (GP Log 0x04)
- Page Offset Size Value Flags Description
- 0x01 ===== = = === == General Statistics (rev 1) ==
- 0x01 0x008 4 37 --- Lifetime Power-On Resets
- 0x01 0x010 4 15530 --- Power-on Hours
- 0x01 0x018 6 162681484502 --- Logical Sectors Written
- 0x01 0x020 6 2536559516 --- Number of Write Commands
- 0x01 0x028 6 108935116434 --- Logical Sectors Read
- 0x01 0x030 6 154496086 --- Number of Read Commands
- 0x01 0x038 6 55911393150 --- Date and Time TimeStamp
- 0x03 ===== = = === == Rotating Media Statistics (rev 1) ==
- 0x03 0x008 4 15269 --- Spindle Motor Power-on Hours
- 0x03 0x010 4 15269 --- Head Flying Hours
- 0x03 0x018 4 668 --- Head Load Events
- 0x03 0x020 4 0 --- Number of Reallocated Logical Sectors
- 0x03 0x028 4 16 --- Read Recovery Attempts
- 0x03 0x030 4 0 --- Number of Mechanical Start Failures
- 0x04 ===== = = === == General Errors Statistics (rev 1) ==
- 0x04 0x008 4 0 --- Number of Reported Uncorrectable Errors
- 0x04 0x010 4 0 --- Resets Between Cmd Acceptance and Completion
- 0x05 ===== = = === == Temperature Statistics (rev 1) ==
- 0x05 0x008 1 32 --- Current Temperature
- 0x05 0x010 1 31 N-- Average Short Term Temperature
- 0x05 0x018 1 31 N-- Average Long Term Temperature
- 0x05 0x020 1 46 --- Highest Temperature
- 0x05 0x028 1 18 --- Lowest Temperature
- 0x05 0x030 1 41 N-- Highest Average Short Term Temperature
- 0x05 0x038 1 24 N-- Lowest Average Short Term Temperature
- 0x05 0x040 1 36 N-- Highest Average Long Term Temperature
- 0x05 0x048 1 25 N-- Lowest Average Long Term Temperature
- 0x05 0x050 4 0 --- Time in Over-Temperature
- 0x05 0x058 1 60 --- Specified Maximum Operating Temperature
- 0x05 0x060 4 0 --- Time in Under-Temperature
- 0x05 0x068 1 0 --- Specified Minimum Operating Temperature
- 0x06 ===== = = === == Transport Statistics (rev 1) ==
- 0x06 0x008 4 168 --- Number of Hardware Resets
- 0x06 0x010 4 52 --- Number of ASR Events
- 0x06 0x018 4 0 --- Number of Interface CRC Errors
- 0xff ===== = = === == Vendor Specific Statistics (rev 1) ==
- |||_ C monitored condition met
- ||__ D supports DSN
- |___ N normalized value
- Pending Defects log (GP Log 0x0c)
- No Defects Logged
- SATA Phy Event Counters (GP Log 0x11)
- ID Size Value Description
- 0x0001 2 0 Command failed due to ICRC error
- 0x0002 2 0 R_ERR response for data FIS
- 0x0003 2 0 R_ERR response for device-to-host data FIS
- 0x0004 2 0 R_ERR response for host-to-device data FIS
- 0x0005 2 0 R_ERR response for non-data FIS
- 0x0006 2 0 R_ERR response for device-to-host non-data FIS
- 0x0007 2 0 R_ERR response for host-to-device non-data FIS
- 0x0008 2 0 Device-to-host non-data FIS retries
- 0x0009 2 3 Transition from drive PhyRdy to drive PhyNRdy
- 0x000a 2 4 Device-to-host register FISes sent due to a COMRESET
- 0x000b 2 0 CRC errors within host-to-device FIS
- 0x000d 2 0 Non-CRC errors within host-to-device FIS
- ============= /dev/sdb =============
- smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-56-generic] (local build)
- Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org
- === START OF INFORMATION SECTION ===
- Device Model: HGST HUS726T4TALA6L1
- Serial Number: V6H076SS
- LU WWN Device Id: 5 000cca 097ce3299
- Firmware Version: VLGNX41C
- User Capacity: 4,000,787,030,016 bytes [4.00 TB]
- Sector Size: 512 bytes logical/physical
- Rotation Rate: 7200 rpm
- Form Factor: 3.5 inches
- Device is: Not in smartctl database [for details use: -P showall]
- ATA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4
- SATA Version is: SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
- Local Time is: Tue Feb 2 15:39:46 2021 CST
- SMART support is: Available - device has SMART capability.
- SMART support is: Enabled
- AAM feature is: Unavailable
- APM level is: 254 (maximum performance)
- Rd look-ahead is: Enabled
- Write cache is: Enabled
- DSN feature is: Unavailable
- ATA Security is: Disabled, NOT FROZEN [SEC1]
- Wt Cache Reorder: Enabled
- === START OF READ SMART DATA SECTION ===
- SMART overall-health self-assessment test result: PASSED
- General SMART Values:
- Offline data collection status: (0x82) Offline data collection activity
- was completed without error.
- Auto Offline Data Collection: Enabled.
- Self-test execution status: ( 0) The previous self-test routine completed
- without error or no self-test has ever
- been run.
- Total time to complete Offline
- data collection: ( 87) seconds.
- Offline data collection
- capabilities: (0x5b) SMART execute Offline immediate.
- Auto Offline data collection on/off support.
- Suspend Offline collection upon new
- command.
- Offline surface scan supported.
- Self-test supported.
- No Conveyance Self-test supported.
- Selective Self-test supported.
- SMART capabilities: (0x0003) Saves SMART data before entering
- power-saving mode.
- Supports SMART auto save timer.
- Error logging capability: (0x01) Error logging supported.
- General Purpose Logging supported.
- Short self-test routine
- recommended polling time: ( 2) minutes.
- Extended self-test routine
- recommended polling time: ( 532) minutes.
- SCT capabilities: (0x003d) SCT Status supported.
- SCT Error Recovery Control supported.
- SCT Feature Control supported.
- SCT Data Table supported.
- SMART Attributes Data Structure revision number: 16
- Vendor Specific SMART Attributes with Thresholds:
- ID# ATTRIBUTE_NAME FLAGS VALUE WORST THRESH FAIL RAW_VALUE
- 1 Raw_Read_Error_Rate PO-R-- 100 100 016 - 0
- 2 Throughput_Performance P-S--- 129 129 054 - 104
- 3 Spin_Up_Time POS--- 176 176 024 - 252 (Average 230)
- 4 Start_Stop_Count -O--C- 100 100 000 - 38
- 5 Reallocated_Sector_Ct PO--CK 100 100 005 - 0
- 7 Seek_Error_Rate PO-R-- 100 100 067 - 0
- 8 Seek_Time_Performance P-S--- 128 128 020 - 18
- 9 Power_On_Hours -O--C- 098 098 000 - 15532
- 10 Spin_Retry_Count PO--C- 100 100 060 - 0
- 12 Power_Cycle_Count -O--CK 100 100 000 - 38
- 192 Power-Off_Retract_Count -O--CK 100 100 000 - 669
- 193 Load_Cycle_Count -O--C- 100 100 000 - 669
- 194 Temperature_Celsius -O---- 181 181 000 - 33 (Min/Max 17/46)
- 196 Reallocated_Event_Count -O--CK 100 100 000 - 0
- 197 Current_Pending_Sector -O---K 100 100 000 - 0
- 198 Offline_Uncorrectable ---R-- 100 100 000 - 0
- 199 UDMA_CRC_Error_Count -O-R-- 200 200 000 - 0
- ||||||_ K auto-keep
- |||||__ C event count
- ||||___ R error rate
- |||____ S speed/performance
- ||_____ O updated online
- |______ P prefailure warning
- General Purpose Log Directory Version 1
- SMART Log Directory Version 1 [multi-sector log support]
- Address Access R/W Size Description
- 0x00 GPL,SL R/O 1 Log Directory
- 0x01 SL R/O 1 Summary SMART error log
- 0x02 SL R/O 1 Comprehensive SMART error log
- 0x03 GPL R/O 1 Ext. Comprehensive SMART error log
- 0x04 GPL R/O 256 Device Statistics log
- 0x04 SL R/O 255 Device Statistics log
- 0x06 SL R/O 1 SMART self-test log
- 0x07 GPL R/O 1 Extended self-test log
- 0x08 GPL R/O 2 Power Conditions log
- 0x09 SL R/W 1 Selective self-test log
- 0x0c GPL R/O 688 Pending Defects log
- 0x10 GPL R/O 1 NCQ Command Error log
- 0x11 GPL R/O 1 SATA Phy Event Counters log
- 0x12 GPL R/O 1 SATA NCQ Non-Data log
- 0x13 GPL R/O 1 SATA NCQ Send and Receive log
- 0x15 GPL R/W 1 Rebuild Assist log
- 0x21 GPL R/O 1 Write stream error log
- 0x22 GPL R/O 1 Read stream error log
- 0x24 GPL R/O 256 Current Device Internal Status Data log
- 0x25 GPL R/O 256 Saved Device Internal Status Data log
- 0x30 GPL,SL R/O 9 IDENTIFY DEVICE data log
- 0x80-0x9f GPL,SL R/W 16 Host vendor specific log
- 0xe0 GPL,SL R/W 1 SCT Command/Status
- 0xe1 GPL,SL R/W 1 SCT Data Transfer
- SMART Extended Comprehensive Error Log Version: 1 (1 sectors)
- No Errors Logged
- SMART Extended Self-test Log Version: 1 (1 sectors)
- Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
- # 1 Short offline Completed without error 00% 30 -
- # 2 Short offline Completed without error 00% 27 -
- # 3 Short offline Completed without error 00% 26 -
- # 4 Short offline Completed without error 00% 10 -
- # 5 Short offline Completed without error 00% 9 -
- # 6 Short offline Completed without error 00% 8 -
- # 7 Short offline Completed without error 00% 5 -
- # 8 Short offline Completed without error 00% 4 -
- # 9 Short offline Completed without error 00% 0 -
- SMART Selective self-test log data structure revision number 1
- SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
- 1 0 0 Not_testing
- 2 0 0 Not_testing
- 3 0 0 Not_testing
- 4 0 0 Not_testing
- 5 0 0 Not_testing
- Selective self-test flags (0x0):
- After scanning selected spans, do NOT read-scan remainder of disk.
- If Selective self-test is pending on power-up, resume after 0 minute delay.
- SCT Status Version: 3
- SCT Version (vendor specific): 256 (0x0100)
- Device State: Active (0)
- Current Temperature: 33 Celsius
- Power Cycle Min/Max Temperature: 30/35 Celsius
- Lifetime Min/Max Temperature: 17/46 Celsius
- Under/Over Temperature Limit Count: 0/0
- SCT Temperature History Version: 2
- Temperature Sampling Period: 1 minute
- Temperature Logging Interval: 1 minute
- Min/Max recommended Temperature: 0/60 Celsius
- Min/Max Temperature Limit: -40/70 Celsius
- Temperature History Size (Index): 128 (7)
- Index Estimated Time Temperature Celsius
- 8 2021-02-02 13:32 32 *************
- ... ..(100 skipped). .. *************
- 109 2021-02-02 15:13 32 *************
- 110 2021-02-02 15:14 33 **************
- ... ..( 4 skipped). .. **************
- 115 2021-02-02 15:19 33 **************
- 116 2021-02-02 15:20 34 ***************
- ... ..( 11 skipped). .. ***************
- 0 2021-02-02 15:32 34 ***************
- 1 2021-02-02 15:33 33 **************
- ... ..( 4 skipped). .. **************
- 6 2021-02-02 15:38 33 **************
- 7 2021-02-02 15:39 32 *************
- SCT Error Recovery Control:
- Read: Disabled
- Write: Disabled
- Device Statistics (GP Log 0x04)
- Page Offset Size Value Flags Description
- 0x01 ===== = = === == General Statistics (rev 1) ==
- 0x01 0x008 4 38 --- Lifetime Power-On Resets
- 0x01 0x010 4 15532 --- Power-on Hours
- 0x01 0x018 6 162682521635 --- Logical Sectors Written
- 0x01 0x020 6 2549672578 --- Number of Write Commands
- 0x01 0x028 6 108894326118 --- Logical Sectors Read
- 0x01 0x030 6 150295668 --- Number of Read Commands
- 0x01 0x038 6 55916078700 --- Date and Time TimeStamp
- 0x03 ===== = = === == Rotating Media Statistics (rev 1) ==
- 0x03 0x008 4 15269 --- Spindle Motor Power-on Hours
- 0x03 0x010 4 15269 --- Head Flying Hours
- 0x03 0x018 4 669 --- Head Load Events
- 0x03 0x020 4 0 --- Number of Reallocated Logical Sectors
- 0x03 0x028 4 1 --- Read Recovery Attempts
- 0x03 0x030 4 0 --- Number of Mechanical Start Failures
- 0x04 ===== = = === == General Errors Statistics (rev 1) ==
- 0x04 0x008 4 0 --- Number of Reported Uncorrectable Errors
- 0x04 0x010 4 0 --- Resets Between Cmd Acceptance and Completion
- 0x05 ===== = = === == Temperature Statistics (rev 1) ==
- 0x05 0x008 1 33 --- Current Temperature
- 0x05 0x010 1 32 N-- Average Short Term Temperature
- 0x05 0x018 1 32 N-- Average Long Term Temperature
- 0x05 0x020 1 46 --- Highest Temperature
- 0x05 0x028 1 17 --- Lowest Temperature
- 0x05 0x030 1 42 N-- Highest Average Short Term Temperature
- 0x05 0x038 1 24 N-- Lowest Average Short Term Temperature
- 0x05 0x040 1 36 N-- Highest Average Long Term Temperature
- 0x05 0x048 1 25 N-- Lowest Average Long Term Temperature
- 0x05 0x050 4 0 --- Time in Over-Temperature
- 0x05 0x058 1 60 --- Specified Maximum Operating Temperature
- 0x05 0x060 4 0 --- Time in Under-Temperature
- 0x05 0x068 1 0 --- Specified Minimum Operating Temperature
- 0x06 ===== = = === == Transport Statistics (rev 1) ==
- 0x06 0x008 4 174 --- Number of Hardware Resets
- 0x06 0x010 4 50 --- Number of ASR Events
- 0x06 0x018 4 0 --- Number of Interface CRC Errors
- 0xff ===== = = === == Vendor Specific Statistics (rev 1) ==
- |||_ C monitored condition met
- ||__ D supports DSN
- |___ N normalized value
- Pending Defects log (GP Log 0x0c)
- No Defects Logged
- SATA Phy Event Counters (GP Log 0x11)
- ID Size Value Description
- 0x0001 2 0 Command failed due to ICRC error
- 0x0002 2 0 R_ERR response for data FIS
- 0x0003 2 0 R_ERR response for device-to-host data FIS
- 0x0004 2 0 R_ERR response for host-to-device data FIS
- 0x0005 2 0 R_ERR response for non-data FIS
- 0x0006 2 0 R_ERR response for device-to-host non-data FIS
- 0x0007 2 0 R_ERR response for host-to-device non-data FIS
- 0x0008 2 0 Device-to-host non-data FIS retries
- 0x0009 2 3 Transition from drive PhyRdy to drive PhyNRdy
- 0x000a 2 4 Device-to-host register FISes sent due to a COMRESET
- 0x000b 2 0 CRC errors within host-to-device FIS
- 0x000d 2 0 Non-CRC errors within host-to-device FIS
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement