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6.1 How RAID Works

RAID, or Redundant Array of Independent Disks, is a data-storage technology that

spreads data across multiple drives. This technology provides several benefits:



Data redundancy for protection and availability.



Higher performance as a result of reading or writing on several drives

simultaneously.



Scalability for expansion of storage.

Accusys RAID systems use a hardware controller to manage multiple drives as one or

more RAID array group, which offloads RAID task from host, and provides

independent, fast and highly efficient storage.

The way of controller stores and retrieves data on the RAID system is determined by

the RAID level and storage method you choose. Once you have defined a group of

drives as an array group, each logical disk appears to the host system as one Logical

Unit (LUN), regardless of the number of actual drives in that logical unit.

6.2 RAID Levels

The RAID system supports several RAID levels and configurations. Each level has a

different architecture and provides varying degrees of performance and fault tolerance.

Содержание TShare A16T3-Share

Страница 1: ...A16T3 Share User Guide Accusys Storage Ltd 2017 Version V1 0 ...

Страница 2: ...Revision Sheet Release No Date Revision Description V1 0 2017 8 Officially released ...

Страница 3: ...the safety instruction is not observed Note This indicates useful tips on getting the most from your RAID system Trademarks Accusys and the names of Accusys products and logos referenced herein are trademarks and or service marks or registered trademarks and or service marks of Accusys Storage Ltd All contents of this manual are copyrighted by Accusys Storage Ltd The information contained herein i...

Страница 4: ...onents in anti static bags d Handle circuit boards by their edges and avoid touching chips and connectors Choosing the Location for the System The Tshare A16T3 SHARE is designed as a rack mount solution Depending on where your rack is located you should keep the following points in mind when determining where to place your system 1 Measure the amount of available space in the rack The amount of sp...

Страница 5: ...u need assistance with planning for the power needs of your components 5 When possible plug the redundant power supplies onto different circuits 6 Make sure that the power outlets for all hardware components are grounded according to local and national standards Consult an electrician if you need assistance with grounding Operating Environment The operating environment for the Tshare A16T3 SHARE m...

Страница 6: ...talling Driver and GUI on Host 21 4 5 Connecting Host Port 22 4 6 T Share Expansion 23 4 7 T Pairing 24 5 RAIDGuardX 26 5 1 RAIDGuardX Overview 27 5 1 1 Menu Bar 27 5 1 2 RAIDGuardX Main Console 28 5 2 Add Remove Controller 29 5 2 1 Add Controller 29 5 2 2 Remove Controller 29 5 3 Create Delete an Array 30 5 3 1 Create Array 30 5 3 2 Delete an Array 32 5 4 Email Notification 33 5 5 Preference 34 5...

Страница 7: ... 9 Disk RW Test 53 6 RAID Overview 55 6 1 How RAID Works 56 6 2 RAID Levels 56 6 2 1 RAID 0 Striping 57 6 2 2 RAID 1 Mirroring 57 6 2 3 RAID 5 Striping Disks with Distributed Parity 57 6 2 4 RAID 6 Independent Data Disks with Two Independent Parity Schemes 58 6 2 5 RAID 0 1 Striped Set with Mirroring 58 6 2 6 Enhance JBOD Single Disk 58 7 Appendix 60 Appendix A FAQs 61 Appendix B Customer Service ...

Страница 8: ...1 Introduce Shareable Thunderbolt RAID System ...

Страница 9: ...d innovative thinking will eliminate the high cost of Fibre Channel SAN or 10 Gigabit Ethernet The A16T3 Share is equipped with the functionality of a complete SAN solution within a single Thunderbolt storage device the high performance of Thunderbolt 3 without any protocol conversion latency and the reliability derived from an independent hardware RAID system The A16T3 Share has four Thunderbolt ...

Страница 10: ...2 What s in the box ...

Страница 11: ... x2 3 Packing list Packing list 4 USB Manual Driver GUI Firmware files 5 Power cord AC power cord x2 6 Rail Extender Extend RAID system from rack x2 7 Screws pack For installing disk x2 8 Bolts pack For installing to rack x6 9 Power converter UK EU AU to US x6 10 RAID system A16T3 Share ...

Страница 12: ...3 Introduce A16T3 Share ...

Страница 13: ...ed 2 System Fan Blue fan modules are working normally Red fan module failed 3 System Temperature Blue system temperature is normal Red system temperature is overheat 4 System Power Blue power supplies are working normally Red power supply failed 5 Mute Button Pushing the button for 2 seconds to mute the system beeper If another warning occurs the beeper will alarm again ...

Страница 14: ...tatus LED 1 Access LED LED 2 Status LED Disk Online Locked Steady Green No Disk Disk Fail Steady Red Disk Access Initialization Flashing Blue Steady Green Disk Rebuild Flashing Blue Switching in Red and Green Disk Expansion Flashing Blue Extend Drives Steady Red Original Drives Steady Green Disk Migration Flashing Blue Migrate Drives Steady Red Original Drives Steady Green ...

Страница 15: ...3 4 The rear side of A16T3 Share No Name Description 1 RAID controller The controller of RAID system 2 FAN Redundant SMART speed control 3 Power Supply 100 240V 400W Redundant power module ...

Страница 16: ...rt For engineer debugging only 4 T Share Expansion switch Setting the chassis to be Master or Slave 5 JBOD Expansion port Expanding to another JBOD enclosure LED1 Blue Data access status LED2 Green Link status 6 PCIe port Connecting to PCIe Host Z2M C2M or expanding the other RAID system for T Share Expansion LED1 Blue Data access status LED2 Green Link status LED3 Amber Master Slave connected ...

Страница 17: ...4 Install A16T3 Share ...

Страница 18: ... standard rack Follow the steps to properly install you RAID system into rack 2 Tighten 2 rack screws in both front and rear side 1 Loosen rail screws of rail set and adjust the length to fit your rack 3 Tighten 4 rail screws 4 Install RAID system into the rack and securing with 4 rack bolts ...

Страница 19: ...re drive with screws as below figures Four screws for 3 5 Three screws for 2 5 2 Push the tray inward until the tray firmly connects and you hear the tray click into place 3 Repeat for all drives to be installed into the A16T3 Share Note Recommend using drives with same size speed model and firmware version ...

Страница 20: ...age to connect the EXP port of A16T3 Share and SAS port of A16S3 SJ 2 Set ID dip switch of A16S3 SJ to 1 Note If you have three A16S3 SJ JBOD enclosures set ID as below 1st A16S3 SJ ID 1 2nd A16S3 SJ ID 2 3rd A16S3 SJ ID 3 If ID conflicted some drives on JBOD would not recognize 3 Power on First to power on all JBOD enclosures then power on RAID system 4 Power off First to power off RAID system th...

Страница 21: ...er or Accusys support team see chapter Customer Service and Technical Support for more information 1 Find installer file from USB drive or Accusys website 2 Double clicking the file and follow the onscreen instructions to install a Restart is needed to complete installation Note Once OS prompt can t be opened because it is from an unidentified developer open System Preferences Security Privacy in ...

Страница 22: ... the connection will fail 2 Connect to SAN port Z2M C2M when connect to PCIe host 3 The PCIe port can be used for T Share Expansion by connecting two A16T3 Share RAID systems refer to Chapter 4 6 T Share Expansion 2 On RAIDGuardX create array and select Thunderbolt host port e g plan to build a SAN set array can be visible for all host ports 3 Click Create Array the new volume shell be recognized ...

Страница 23: ...o simultaneously collaborate on projects with extreme workflow efficiency Requirement Two A16T3 Share RAID systems PCIe cable Installation 1 Set T Share Expansion switch of 1st RAID system to Master 2nd RAID system to Slave 2 Use a PCIe cable to connect PCIe port of both RAID systems 3 Power on 2nd RAID system first and then power on 1st RAID system boot up will be ready in a minute and then start...

Страница 24: ...for the use of multiple ports to experience enhanced performance T pairing is protocol independent and all T share devices are pre installed with Accusys Mac Installer which includes the driver for T Pairing Once the driver is installed it will automatically communicate with the T Share RAID controller for easy configuration Accusys T share devices employ the Thunderbolt interface in a SAN environ...

Страница 25: ...D system 2 Connect RAID system and Host with two Thunderbolt cables 3 Power on Host and install Accusys Installer 4 Create an array check Assign LUN automatically and select 2 Thunderbolt host ports Note 1 T Pairing does not support Hot Plug and Fail Over Need to have a reboot to get T Pairing function back while cable re plugged 2 T Pairing only functions with specific host computer have two Thun...

Страница 26: ...5 RAIDGuardX ...

Страница 27: ...MUST be installed to the host directly connected to RAID system 5 1 1Menu Bar The menu bar across the top contains the following functions Function Description File Exit Close the program Load Controller List Refresh the controller list Language English and Japanese are supported Controller Manual Add Controller Add remote controller by IP address of RAIDGuardX Server Update Update firmware System...

Страница 28: ... NCQ mode Enable Disable SMART Mode Enable Disable Beeper Enable Disable Equalization Enable Disable Cache of controller and drives can be enable disable MISC for controller Time setup Option Slicing an existing array for multiple slices LUN Map setup for multiple slices LUN Connect setup for specific host port Expansion with new drive into an array Migration between different RAID level Snapshot ...

Страница 29: ...ual Add Controller type the remote host IP address Where the RAIDGuard Server installed is click search to display all available controllers 2 Click on a controller and enter password default is 00000000 8 zeros then you can type a controller name to remark click Add to open main console Note Password can be changed in section Preference MISC 3 In main console you can monitor and manage this RAID ...

Страница 30: ...gn automatically and you can select host port 2 You can change the setting of host port on Options LUN connect 2 Select the RAID level from the drop down menu Available levels are 0 1 5 6 0 1 enhanced JBOD Find more details in Chapter 5 RAID Overview 3 Select the sector size Available sector sizes are 512 bytes default and 4096 bytes The sector size 4096 bytes is only used on WinXP for recognized ...

Страница 31: ...bitmap you can still use the RAID system during the initialization Performance evaluation Select to evaluate the performance of the target array It will take no time for array initialization there is no data protection only for testing purpose Caution Array created by Performance evaluation could not do array rebuild DO NOT use this type for production environment 6 Check Assign LUN automatically ...

Страница 32: ...ardX to pop up a dialog as below picture 2 Click on the drive icon of the array to be deleted 3 Check the Confirm box Click Delete Array to complete the process Note Array cannot be deleted during any actions e g initialing rebuilding Caution When delete an array all data on the hard disk drives will be lost ...

Страница 33: ... check that the e mail is working 2 SMTP Setting Mail Server Name Enter the address of the mail server From Email Address Enter the e mail address of the mail server 3 SMTP Server Set authenticated user name and password Check this box if your mail server requires a user name and password 4 SMTP POST event Check this box When error happened RAID controller will automatically send notice email to s...

Страница 34: ... if some hard disks fail to perform well In the event of performance degradation or delay of a single drive due to aging the RAID system reads both data and parity stripes concurrently It bypasses the slow reads and returns data to the host with the regenerated data and to provide stable performance based on the RAID parity Note Slow response of some hard disks can be tolerated in DLP mode you may...

Страница 35: ...reliability in the hope of anticipating failure Accusys RAID system supports S M A R T Once this function is selected you can select the check interval from the drop down list Choose from 1 minute to 8 hours for SMART Mode to be active The RAID controller will command each hard disk to perform S M A R T according to the check interval selected The check results will be shown as an Event message in...

Страница 36: ... the transmission method the data transmission speed cannot be guaranteed at all times This feature allows the continuous I Os to operate more smoothly and substantially reduce large fluctuations in efficiency during data transfer For video editing enable equalization to prevent video frame drops ...

Страница 37: ...frequently latency time within For video capture disable synchronization because the video capture needs to be able to constantly write data to the RAID storage without long latency Read Pre fetch Identifies sequential access patterns and aggressively pre fetches patters into cache From the drop down list choose the number of stripes to pre fetch The default is 32 this is the recommended number Dr...

Страница 38: ... Click this button to see a calendar and to change the time and date of the controller Password Enter the new controller password The default password is 00000000 8 zeros Type another 8 characters Password Confirmation Confirm the new controller password Note If you forget your password you will have to contact your agent or the Accusys Support Team SNMP Notification Select SNMPv1 or SNMPv2 to sen...

Страница 39: ...rive or RAID system by subdividing a RAID array into segments or slices These slices are effective hardware partitions of all drives in the array Each slice is a separate LUN and appears as a separate volume on the host computer After slicing the LUN map must be set for each slice Slicing concept ...

Страница 40: ...slice space and click OK to confirm Repeat the same steps to slice more spaces if need Note Up to 16 slices per array The total number of unique arrays slices cannot exceed 16 Usage Scenario The access speed of the data stored in the outer circle is faster than the inner circle Suppose there are two slices in a hard drive Slice 0 locates in the outer circles while Slice 1 in the inner circle for a...

Страница 41: ...ally using LUN map Note One slice can only be assigned one LUN The RAID controller supports up to 64 LUNs 1 Select the array to map by clicking on a drive with an array number 2 Choose a LUN and from the drop down list select a slice to map to check the Confirm box and click OK 3 Repeat the steps to set more LUN maps if need 5 6 3LUN Connect In LUN Connect user can manually define LUN can be visib...

Страница 42: ...ay or stop an array you may add new disks online while the array is in use its performance is affected considerably You may check the progress of Expansion in the main view Example Note The new hard drive must larger than the existing drives of array Follow the steps below to select an array to expand 1 Select the array to add additional drives and select the number of drives to be added A sign ap...

Страница 43: ...d This can be useful when new drives have been added and a new array type needs to be created Example 1 RAID 5 12 drives Migrating RAID 0 11 drives RAID 5 12 drives Migrating RAID 6 13 drives RAID 5 12 drives Migrating RAID 0 1 22 drives Example 2 Example 3 Note The new hard drive must larger than the existing drives of array Follow the steps below to select an array to migrate This changes the RA...

Страница 44: ...te to and then select the total number of drives to include in the array A appears above the drive s to be added and a sign above the drive s to be removed 2 Check the Confirm box and click Migrate 3 The main array information screen will indicate that the array is currently migrating ...

Страница 45: ...the source and target after the background sync is completed The I O mirroring is stopped and the difference is under tracking in a bitmap table to support fast re sync Create Shot Create a snapshot of the selected slice A maximum of 8 shots can be created Once all shots have been used older shots must be deleted before new ones can be taken 1 Select the Create Shot function from the drop down men...

Страница 46: ...ot Split Now Split the selected shot or changes scheduling The shot is split and read as two separate shots therefore it becomes two separate slices after being split 1 Select the Split Shot function from the drop down menu 2 Select the Split Now radio button 3 Select the required shot by clicking on the Shot No radio button From the respective drop down menus select the source volume and destinat...

Страница 47: ... the snapshot Cancel Scheduling Cancel the split shot scheduling 1 Select the Split Shot function from the drop down menu 2 Select the Cancel Scheduling radio button 3 Select the required shot by clicking on the Shot No radio button From the respective drop down menus select the source volume and destination volume Unavailable shots are grayed out 4 Check the Confirm box and click OK to split the ...

Страница 48: ...the snapshot Note 1 The destination volume must be equal or larger in size than the source volume 2 The source volume and the destination volume can be on different arrays 3 The destination volume must NOT be mapped to a LUN 4 A shot will not be deleted if the details of the array change The only way to delete a shot is using the Delete Shot function under Snapshot ...

Страница 49: ...k the radio button to Rebuild the parity data Rebuilding parity on an array uses the data on the array to create new parity data no repair problems with the data Verify the parity data Verify that the data is free of errors Refresh array data and parity Select the priority between Low Med or High This process scans rewrites and scrubs bad data conditions caused by excessive vibration during drive ...

Страница 50: ...rive Drop When you unlock the drive it will be added directly to the array if there has not been drive access during the locked period Otherwise the controller will rebuild parity data on the drive when the drive is online Note If Drive Drop occurs it is recommended to use S M A R T to check the drive condition and replace it if necessary 2 When a drive has been used by RAID system that drive will...

Страница 51: ...1 Select the drive with the icon It will change to the icon 2 Check the Confirm box and click Unlock Drive ...

Страница 52: ...m during updating in order to avoid any damage Firmware update time will take 2 5 minutes 3 Select Controller in the Menu bar move to Update Update System Code in drop menu 4 Choose correct System Code file to start updating During the update process the RAID system will stop all data access Caution Do NOT interrupt or stop updates that are in progress Firmware update will take 2 5 minutes 5 Once ...

Страница 53: ...ne of disks begins to drop down in Read Write the entire RAID system would slow down and sometimes SMART function cannot figure out which one is the slow disk Disk RW Test funtion executes read write test on each disk and list the result on Event page for reference User can replace the slowest disk to improve the whole system performance When performing Disk RW Test All disks in RAID JBOD enclosur...

Страница 54: ...2 Click Yes on dialog window 3 Display test result on Event page Spare disks Array Member disks ...

Страница 55: ...6 RAID Overview ...

Страница 56: ...one or more RAID array group which offloads RAID task from host and provides independent fast and highly efficient storage The way of controller stores and retrieves data on the RAID system is determined by the RAID level and storage method you choose Once you have defined a group of drives as an array group each logical disk appears to the host system as one Logical Unit LUN regardless of the num...

Страница 57: ...nd improved performance for read intensive applications but this level has a high capacity cost because it retains a full copy of your data on each drive in the mirror set 6 2 3RAID 5 Striping Disks with Distributed Parity By distributing the parity information across all drives in a set RAID level 5 achieves high reliability and data availability which allows one of the array member disk to have ...

Страница 58: ...the array member disks to have failures at the same time and keeps the storage working 6 2 5RAID 0 1 Striped Set with Mirroring RAID 0 1 combines the advantages of RAID 0 and RAID 1 with no disadvantages RAID 0 1 creates a mirror of the primary striped set RAID 0 1 provides optimal speed and reliability 6 2 6Enhance JBOD Single Disk Enhance JBOD is just export single disk to the host system The ca...

Страница 59: ...ce RAID0 Stripe 2 Single Drive N None High RAID1 Mirror 2 Single Drive 1 N 1 Low RAID5 Stripe with 1 Parity 3 Single Drive N 1 1 Medium RAID6 Stripe with 2 Parities 4 Single Drive N 2 2 Medium RAID 0 1 Stripe Mirror 4 Single Drive N 2 2 Low Enhance JBOD Single Drive 1 Single Drive 1 None Low ...

Страница 60: ...7 Appendix ...

Страница 61: ... expected level following reasons could be the cause a some of hard drives does not work well b too many fragmented data To replace problematic drives and try to run defragment function of file system to rearrange fragmented data 4 Q Insert a drive RAID system start warning with 3 short beeps the drive s status is locked on RAIDGuardX why A The drive could be initialized in other Accusys product a...

Страница 62: ...le of Beeper Code for more detail Beeper mode Description 1 short beep boot up RAID system is ready 1 short beep Array init rebuild expansion migratrion 2 short beeps Wrong ID setting of JBOD enclosure 3 short beeps Error of Fan Power RAID or Disk locked 1 long beep System Panic long beep repeatedly PCIe port connects error Connect to wrong HBA or Master Slave mode sets wrong ...

Страница 63: ...er log by Dump controller log of RAIDGuardX 2 Host operation system log with RAID related error B 2 Contact Us Email us for customer services and technical support Sales sales accusys com tw Technical Support support accusys com tw B 3 Website Please visit our websites frequently for the most up to date product and support information All countries www accusys com tw Korea http accusys co kr ...

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