<\/p>\n
You can drop and re-create flash disks and flash cache on Exadata cellnodes online.<\/p>\n
You will need this process if the flash cache is not in the normal state after the flash modules have changed. T<\/p>\n
he status of flash disks may not be normal after flash module replacement.<\/p>\n
To view the status of Flash disks;<\/p>\n
[root@oracel01 ~]# cellcli\r\nCellCLI: Release 11.2.3.3.0 - Production on Fri Sep 23 11:44:46 EEST 2016\r\n\r\nCopyright (c) 2007, 2013, Oracle. All rights reserved.\r\nCell Efficiency Ratio: 13,622\r\n\r\nCellCLI> list physicaldisk\r\n20:0 E0RRL6 normal\r\n20:1 E0Q6VY normal\r\n20:2 E0R2NR normal\r\n20:3 E4CKCK normal\r\n20:4 E0RAFP normal\r\n20:5 E0RGND normal\r\n20:6 E1ABV1 normal\r\n20:7 E0RALR normal\r\n20:8 E0R1LF normal\r\n20:9 E0R5A1 normal\r\n20:10 E0RANE normal\r\n20:11 E0RAHN normal\r\nFLASH_1_0 1031M0413C normal\r\nFLASH_1_1 1031M042PM normal\r\nFLASH_1_2 1027M03NN8 normal\r\nFLASH_1_3 1027M03NN9 normal\r\nFLASH_2_0 1027M03LDQ normal\r\nFLASH_2_1 1034M04583 normal\r\nFLASH_2_2 1031M04138 normal\r\nFLASH_2_3 1034M04581 normal\r\nFLASH_4_0 1116M08JYA normal\r\nFLASH_4_1 1116M08JR2 normal\r\nFLASH_4_2 1116M08JKT normal\r\nFLASH_4_3 1116M08JMK normal\r\nFLASH_5_0 1116M08GXN normal\r\nFLASH_5_1 1116M08GXL normal\r\nFLASH_5_2 1103M06JVR normal\r\nFLASH_5_3 1116M08GXD normal<\/pre>\n<\/p>\n
To query the Flash cache status;<\/p>\n
CellCLI> list flashcache\r\noracel02_FLASHCACHE warning - degraded<\/pre>\nIf the flash cahce status as above is not normal, you will need to drop and re-create it. You can follow the steps below.<\/p>\n
<\/p>\n
Drop Operations<\/h3>\n
First we drop the flash cache.<\/p>\n
CellCLI> drop flashcache\r\nFlash cache oracel02_FLASHCACHE successfully dropped<\/pre>\n<\/p>\n
Then drop the flash log.<\/p>\n
CellCLI> drop flashlog\r\nFlash log oracel02_FLASHLOG successfully dropped<\/pre>\n<\/p>\n
Finally, we drop the flash disks. We need to drop with force option.<\/p>\n
CellCLI> drop celldisk all flashdisk force\r\nCellDisk FD_00_oracel02 successfully dropped\r\nCellDisk FD_01_oracel02 successfully dropped\r\nCellDisk FD_02_oracel02 successfully dropped\r\nCellDisk FD_03_oracel02 successfully dropped\r\nCellDisk FD_04_oracel02 successfully dropped\r\nCellDisk FD_05_oracel02 successfully dropped\r\nCellDisk FD_06_oracel02 successfully dropped\r\nCellDisk FD_07_oracel02 successfully dropped\r\nCellDisk FD_08_oracel02 successfully dropped\r\nCellDisk FD_09_oracel02 successfully dropped\r\nCellDisk FD_10_oracel02 successfully dropped\r\nCellDisk FD_11_oracel02 successfully dropped\r\nCellDisk FD_12_oracel02 successfully dropped\r\nCellDisk FD_13_oracel02 successfully dropped\r\nCellDisk FD_14_oracel02 successfully dropped\r\nCellDisk FD_15_oracel02 successfully dropped<\/pre>\n<\/p>\n
Create Operations<\/h3>\n
First, we create flash disks.<\/p>\n
CellCLI> create celldisk all flashdisk\r\nCellDisk FD_00_oracel02 successfully created\r\nCellDisk FD_01_oracel02 successfully created\r\nCellDisk FD_02_oracel02 successfully created\r\nCellDisk FD_03_oracel02 successfully created\r\nCellDisk FD_04_oracel02 successfully created\r\nCellDisk FD_05_oracel02 successfully created\r\nCellDisk FD_06_oracel02 successfully created\r\nCellDisk FD_07_oracel02 successfully created\r\nCellDisk FD_08_oracel02 successfully created\r\nCellDisk FD_09_oracel02 successfully created\r\nCellDisk FD_10_oracel02 successfully created\r\nCellDisk FD_11_oracel02 successfully created\r\nCellDisk FD_12_oracel02 successfully created\r\nCellDisk FD_13_oracel02 successfully created\r\nCellDisk FD_14_oracel02 successfully created\r\nCellDisk FD_15_oracel02 successfully created<\/pre>\n<\/p>\n
Then we create the flash log;<\/p>\n
CellCLI> create flashlog all\r\nFlash log oracel02_FLASHLOG successfully created<\/pre>\n<\/p>\n
Then we create the flash cache;<\/p>\n
CellCLI> create flashcache all\r\nFlash cache oracel02_FLASHCACHE successfully created<\/pre>\n<\/p>\n
Now, we need to see the Flash cache status as normal.<\/p>\n
CellCLI> list flashcache\r\noracel02_FLASHCACHE normal<\/pre>\n\n<\/div>\n