Recientemente me pidieron que intentara restaurar los datos de una incursión en un Synology NAS. La raid consta de 2 discos de 2TB de tamaño. Es una redada 1.
Por lo que me dijeron, una de las unidades falló y la unidad de respaldo aún está intacta. Sé cuál de los dos es cuál.
Reensamblar la redada no ha producido ningún resultado. Por alguna razón, el raid siempre se reconoce como md127 después de cada comando mdadm que ejecuto, sin importar qué md declaro en el comando --assemble. Cuando declaro que falta una de las unidades, mdadm comienza a buscar una unidad llamada faltante en lugar de declarar la matriz como degradada. Al final del comando de ensamblaje, el resultado final siempre es "No se encontraron unidades adecuadas para dev/md/e_nas:2.
sudo mdadm --stop /dev/md127
sudo mdadm --assemble --verbose /dev/md0 /dev/sdb3 /dev/sda3
mdadm: looking for devices for /dev/md0
mdadm: /dev/sda3 is busy - skipping
mdadm: Merging with already-assembled /dev/md/e_nas:2
mdadm: /dev/sda3 is identified as a member of /dev/md/e_nas:2, slot 32769.
mdadm: /dev/sdb3 is identified as a member of /dev/md/e_nas:2, slot 32768.
mdadm: No suitable drives found for /dev/md/e_nas:2
sudo mdadm --detail --scan
INACTIVE-ARRAY /dev/md127 metadata=1.2 name=e_nas:2 UUID=213397ad:6d3ef545:dae75da0:662ff5a8
sudo mdadm --stop /dev/md127
sudo mdadm -Afvs
mdadm: looking for devices for further assembly
mdadm: no recogniseable superblock on /dev/sdc1
mdadm: Cannot assemble mbr metadata on /dev/sdc
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p8
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p7
mdadm: no recogniseable superblock on /dev/nvme0n1p6
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p5
mdadm: no recogniseable superblock on /dev/nvme0n1p4
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p3
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1p2
mdadm: no recogniseable superblock on /dev/nvme0n1p1
mdadm: Cannot assemble mbr metadata on /dev/nvme0n1
mdadm: No super block found on /dev/sdb2 (Expected magic a92b4efc, got 32323533)
mdadm: no RAID superblock on /dev/sdb2
mdadm: No super block found on /dev/sdb1 (Expected magic a92b4efc, got 00000099)
mdadm: no RAID superblock on /dev/sdb1
mdadm: No super block found on /dev/sdb (Expected magic a92b4efc, got 00000000)
mdadm: no RAID superblock on /dev/sdb
mdadm: No super block found on /dev/sda2 (Expected magic a92b4efc, got 6d783f3c)
mdadm: no RAID superblock on /dev/sda2
mdadm: No super block found on /dev/sda1 (Expected magic a92b4efc, got 00000099)
mdadm: no RAID superblock on /dev/sda1
mdadm: No super block found on /dev/sda (Expected magic a92b4efc, got 00000000)
mdadm: no RAID superblock on /dev/sda
mdadm: /dev/sdb3 is identified as a member of /dev/md/e_nas:2, slot 32768.
mdadm: /dev/sda3 is identified as a member of /dev/md/e_nas:2, slot 32769.
mdadm: No suitable drives found for /dev/md/e_nas:2
mdadm: looking for devices for further assembly
mdadm: No arrays found in config file or automatically
A continuación se muestran algunos de los datos de las unidades que utilizan el comando --examine.
/dev/sda3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 213397ad:6d3ef545:dae75da0:662ff5a8
Name : e_nas:2
Creation Time : Fri Oct 9 23:42:52 2015
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 3897385120 sectors (1858.42 GiB 1995.46 GB)
Array Size : 1948692416 KiB (1858.42 GiB 1995.46 GB)
Used Dev Size : 3897384832 sectors (1858.42 GiB 1995.46 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=288 sectors
State : clean
Device UUID : c396622f:050e9557:36e44171:82178cbd
Update Time : Sun Jan 29 21:35:43 2023
Checksum : a8f09696 - correct
Events : 5185
Device Role : Active device 32769
Array State : .. ('A' == active, '.' == missing, 'R' == replacing)
WARNING Array state is inconsistent - each number should appear only once
0:- 1:32769 2:- 3:- 4:- 5:- 6:- 7:- 8:- 9:- 10:- 11:- 12:- 13:- 14:- 15:- 16:- 17:- 18:- 19:- 20:- 21:- 22:- 23:- 24:- 25:- 26:- 27:- 28:- 29:- 30:- 31:- 32:- 33:- 34:- 35:- 36:- 37:- 38:- 39:- 40:- 41:- 42:- 43:- 44:- 45:- 46:- 47:- 48:- 49:- 50:- 51:- 52:- 53:- 54:- 55:- 56:- 57:- 58:- 59:- 60:- 61:- 62:- 63:- 64:- 65:- 66:- 67:- 68:- 69:- 70:- 71:- 72:- 73:- 74:- 75:- 76:- 77:- 78:- 79:- 80:- 81:- 82:- 83:- 84:- 85:- 86:- 87:- 88:- 89:- 90:- 91:- 92:- 93:- 94:- 95:- 96:- 97:- 98:- 99:- 100:- 101:- 102:- 103:- 104:- 105:- 106:- 107:- 108:- 109:- 110:- 111:- 112:- 113:- 114:- 115:- 116:- 117:- 118:- 119:- 120:- 121:- 122:- 123:- 124:- 125:- 126:- 127:- 128:- 129:- 130:- 131:- 132:- 133:- 134:- 135:- 136:- 137:- 138:- 139:- 140:- 141:- 142:- 143:- 144:- 145:- 146:- 147:- 148:- 149:- 150:- 151:- 152:- 153:- 154:- 155:- 156:- 157:- 158:- 159:- 160:- 161:- 162:- 163:- 164:- 165:- 166:- 167:- 168:- 169:- 170:- 171:- 172:- 173:- 174:- 175:- 176:- 177:- 178:- 179:- 180:- 181:- 182:- 183:- 184:- 185:- 186:- 187:- 188:- 189:- 190:- 191:- 192:- 193:- 194:- 195:- 196:- 197:- 198:- 199:- 200:- 201:- 202:- 203:- 204:- 205:- 206:- 207:- 208:- 209:- 210:- 211:- 212:- 213:- 214:- 215:- 216:- 217:- 218:- 219:- 220:- 221:- 222:- 223:- 224:- 225:- 226:- 227:- 228:- 229:- 230:- 231:- 232:- 233:- 234:- 235:- 236:- 237:- 238:- 239:- 240:- 241:- 242:- 243:- 244:- 245:- 246:- 247:- 248:- 249:- 250:- 251:- 252:- 253:- 254:- 255:- 256:- 257:- 258:- 259:- 260:- 261:- 262:- 263:- 264:- 265:- 266:- 267:- 268:- 269:- 270:- 271:- 272:- 273:- 274:- 275:- 276:- 277:- 278:- 279:- 280:- 281:- 282:- 283:- 284:- 285:- 286:- 287:- 288:- 289:- 290:- 291:- 292:- 293:- 294:- 295:- 296:- 297:- 298:- 299:- 300:- 301:- 302:- 303:- 304:- 305:- 306:- 307:- 308:- 309:- 310:- 311:- 312:- 313:- 314:- 315:- 316:- 317:- 318:- 319:- 320:- 321:- 322:- 323:- 324:- 325:- 326:- 327:- 328:- 329:- 330:- 331:- 332:- 333:- 334:- 335:- 336:- 337:- 338:- 339:- 340:- 341:- 342:- 343:- 344:- 345:- 346:- 347:- 348:- 349:- 350:- 351:- 352:- 353:- 354:- 355:- 356:- 357:- 358:- 359:- 360:- 361:- 362:- 363:- 364:- 365:- 366:- 367:- 368:- 369:- 370:- 371:- 372:- 373:- 374:- 375:- 376:- 377:- 378:- 379:- 380:- 381:- 382:- 383:-
/dev/sdb3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 213397ad:6d3ef545:dae75da0:662ff5a8
Name : e_nas:2
Creation Time : Fri Oct 9 23:42:52 2015
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 3897385120 sectors (1858.42 GiB 1995.46 GB)
Array Size : 1948692416 KiB (1858.42 GiB 1995.46 GB)
Used Dev Size : 3897384832 sectors (1858.42 GiB 1995.46 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=288 sectors
State : clean
Device UUID : 44e9ebd4:7a7aaf74:5bb8bfbd:98d0343f
Update Time : Fri Jan 20 19:32:43 2023
Checksum : b9ab54fe - correct
Events : 242
Device Role : Active device 32768
Array State : .. ('A' == active, '.' == missing, 'R' == replacing)
WARNING Array state is inconsistent - each number should appear only once
0:32768 1:- 2:- 3:- 4:- 5:- 6:- 7:- 8:- 9:- 10:- 11:- 12:- 13:- 14:- 15:- 16:- 17:- 18:- 19:- 20:- 21:- 22:- 23:- 24:- 25:- 26:- 27:- 28:- 29:- 30:- 31:- 32:- 33:- 34:- 35:- 36:- 37:- 38:- 39:- 40:- 41:- 42:- 43:- 44:- 45:- 46:- 47:- 48:- 49:- 50:- 51:- 52:- 53:- 54:- 55:- 56:- 57:- 58:- 59:- 60:- 61:- 62:- 63:- 64:- 65:- 66:- 67:- 68:- 69:- 70:- 71:- 72:- 73:- 74:- 75:- 76:- 77:- 78:- 79:- 80:- 81:- 82:- 83:- 84:- 85:- 86:- 87:- 88:- 89:- 90:- 91:- 92:- 93:- 94:- 95:- 96:- 97:- 98:- 99:- 100:- 101:- 102:- 103:- 104:- 105:- 106:- 107:- 108:- 109:- 110:- 111:- 112:- 113:- 114:- 115:- 116:- 117:- 118:- 119:- 120:- 121:- 122:- 123:- 124:- 125:- 126:- 127:- 128:- 129:- 130:- 131:- 132:- 133:- 134:- 135:- 136:- 137:- 138:- 139:- 140:- 141:- 142:- 143:- 144:- 145:- 146:- 147:- 148:- 149:- 150:- 151:- 152:- 153:- 154:- 155:- 156:- 157:- 158:- 159:- 160:- 161:- 162:- 163:- 164:- 165:- 166:- 167:- 168:- 169:- 170:- 171:- 172:- 173:- 174:- 175:- 176:- 177:- 178:- 179:- 180:- 181:- 182:- 183:- 184:- 185:- 186:- 187:- 188:- 189:- 190:- 191:- 192:- 193:- 194:- 195:- 196:- 197:- 198:- 199:- 200:- 201:- 202:- 203:- 204:- 205:- 206:- 207:- 208:- 209:- 210:- 211:- 212:- 213:- 214:- 215:- 216:- 217:- 218:- 219:- 220:- 221:- 222:- 223:- 224:- 225:- 226:- 227:- 228:- 229:- 230:- 231:- 232:- 233:- 234:- 235:- 236:- 237:- 238:- 239:- 240:- 241:- 242:- 243:- 244:- 245:- 246:- 247:- 248:- 249:- 250:- 251:- 252:- 253:- 254:- 255:- 256:- 257:- 258:- 259:- 260:- 261:- 262:- 263:- 264:- 265:- 266:- 267:- 268:- 269:- 270:- 271:- 272:- 273:- 274:- 275:- 276:- 277:- 278:- 279:- 280:- 281:- 282:- 283:- 284:- 285:- 286:- 287:- 288:- 289:- 290:- 291:- 292:- 293:- 294:- 295:- 296:- 297:- 298:- 299:- 300:- 301:- 302:- 303:- 304:- 305:- 306:- 307:- 308:- 309:- 310:- 311:- 312:- 313:- 314:- 315:- 316:- 317:- 318:- 319:- 320:- 321:- 322:- 323:- 324:- 325:- 326:- 327:- 328:- 329:- 330:- 331:- 332:- 333:- 334:- 335:- 336:- 337:- 338:- 339:- 340:- 341:- 342:- 343:- 344:- 345:- 346:- 347:- 348:- 349:- 350:- 351:- 352:- 353:- 354:- 355:- 356:- 357:- 358:- 359:- 360:- 361:- 362:- 363:- 364:- 365:- 366:- 367:- 368:- 369:- 370:- 371:- 372:- 373:- 374:- 375:- 376:- 377:- 378:- 379:- 380:- 381:- 382:- 383:-
Aquí están los detalles del md127.
/dev/md127:
Version : 1.2
Raid Level : raid1
Total Devices : 2
Persistence : Superblock is persistent
State : inactive
Working Devices : 2
Name : e_nas:2
UUID : 213397ad:6d3ef545:dae75da0:662ff5a8
Events : 242
Number Major Minor RaidDevice
- 8 19 - /dev/sdb3
- 8 3 - /dev/sda3
Aquí están los dos discos en fdisk -l.
Disk /dev/sda: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20EFRX-68E
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x00085d7c
Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 4982527 4980480 2.4G fd Linux raid autodetect
/dev/sda2 4982528 9176831 4194304 2G fd Linux raid autodetect
/dev/sda3 9437184 3906824351 3897387168 1.8T fd Linux raid autodetect
Disk /dev/sdb: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20EFRX-68E
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x000c2a5c
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 4982527 4980480 2.4G fd Linux raid autodetect
/dev/sdb2 4982528 9176831 4194304 2G fd Linux raid autodetect
/dev/sdb3 9437184 3906824351 3897387168 1.8T fd Linux raid autodetect
Si se necesita más información, estaré encantado de proporcionársela. No estoy muy versado en lo que respecta a raids y recuperación de datos, por lo que cualquier ayuda o consejo será muy apreciado.
Editar1:
Aquí están algunos datos más que se necesitan como indicador enEl comentario de Nikita Kipriyanov
Resultado del lsblk:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 1.8T 0 disk
├─sda1 8:1 0 2.4G 0 part
├─sda2 8:2 0 2G 0 part
└─sda3 8:3 0 1.8T 0 part
└─md127 9:127 0 0B 0 md
sdb 8:16 0 1.8T 0 disk
├─sdb1 8:17 0 2.4G 0 part
├─sdb2 8:18 0 2G 0 part
└─sdb3 8:19 0 1.8T 0 part
└─md127 9:127 0 0B 0 md
Resultado del blkid:
/dev/sdb2: UUID="acfd5239-cd13-40e7-bef6-6bc3124f080c" TYPE="swap" PARTUUID="000c2a5c-02"
/dev/sdb3: UUID="213397ad-6d3e-f545-dae7-5da0662ff5a8" UUID_SUB="44e9ebd4-7a7a-af74-5bb8-bfbd98d0343f" LABEL="e_nas:2" TYPE="linux_raid_member" PARTUUID="000c2a5c-03"
/dev/sdb1: UUID="14da5054-869b-884b-3017-a5a8c86610be" TYPE="linux_raid_member" PARTUUID="000c2a5c-01"
/dev/sdc1: PARTUUID="01bbceed-01"
/dev/sda2: UUID="26036c54-8e86-bf3a-d6dd-008535d3b9f1" TYPE="linux_raid_member" PARTUUID="00085d7c-02"
/dev/sda3: UUID="213397ad-6d3e-f545-dae7-5da0662ff5a8" UUID_SUB="c396622f-050e-9557-36e4-417182178cbd" LABEL="e_nas:2" TYPE="linux_raid_member" PARTUUID="00085d7c-03"
/dev/sda1: UUID="14da5054-869b-884b-3017-a5a8c86610be" TYPE="linux_raid_member" PARTUUID="00085d7c-01"
Aquí hay algunas otras cosas de las que me di cuenta mientras continuaba intentando resolver este problema. Al intentar montar el md me sale este error:
mount: /mnt/md127: can't read superblock on /dev/md127.
dmesg(1) may have more information after failed mount system call.
La entrada dmesg dice:
FAT-fs (md127): unable to read boot sector
Como también señalaNikita Kipriyanov, Ejecuté vgchange -ay. Esto pareció cambiar algo, ya que los detalles de la redada han cambiado. Los 2 volúmenes se han cambiado para eliminarlos y se ha añadido un tercero como repuesto. Aquí está el nuevo resultado:
/dev/md127:
Version : 1.2
Creation Time : Fri Oct 9 23:42:52 2015
Raid Level : raid1
Used Dev Size : 1948692416 (1858.42 GiB 1995.46 GB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Sun Jan 29 21:35:43 2023
State : active, FAILED, Not Started
Active Devices : 0
Working Devices : 1
Failed Devices : 0
Spare Devices : 1
Consistency Policy : unknown
Number Major Minor RaidDevice State
- 0 0 0 removed
- 0 0 1 removed
- 8 3 - spare /dev/sda3