Administrace komentářů

Mno, v logu jsem našel ohledně pole tohle:

md/raid:md0: device sda operational as raid disk 0
md/raid:md0: device sdc operational as raid disk 2
md/raid:md0: device sdb operational as raid disk 1
md/raid:md0: allocated 3174kB
md/raid:md0: raid level 5 active with 3 out of 3 devices, algorithm 2
RAID conf printout:
 --- level:5 rd:3 wd:3
 disk 0, o:1, dev:sda
 disk 1, o:1, dev:sdb
 disk 2, o:1, dev:sdc

Zdá se tedy, že disky by měly být v pořadi sda, sdb, sdc. Zkusil jsem postavit pole z různých dvojic disků. Přesto se ale nedaří na něm nic najít - tedy alespoň vgscan nic nenachází. Chunksize jsem si pohlídal. Je ale pravda, že jednou během sestavování pole jsem chunksize nezadal a ten se nastavil implicitně na 128kb místo 64kb. Nevím, jestli tohle nemohlo data odrovnat... Jinak mám uloženou přesnou konfiguraci toho LVM - pro jistotu ji sem postnu, kdyby se dala nějak využít:

contents = "Text Format Volume Group"
version = 1

description = "Created *after* executing 'vgscan'"

creation_host = "Router"        # Linux Router 2.6.37noCFQ_temp #2 Tue Jan 25 04:23:30 CET 2011 i686
creation_time = 1309892812      # Tue Jul  5 21:06:52 2011

SATA_RAID_pole {
        id = "IlclCy-fDd3-Xfu8-GgJZ-6xoo-TVCH-EDdXIS"
        seqno = 7
        status = ["RESIZEABLE", "READ", "WRITE"]
        flags = []
        extent_size = 8192              # 4 Megabytes
        max_lv = 0
        max_pv = 0

        physical_volumes {

                pv0 {
                        id = "hH0yZF-0wgr-mEcu-82Bg-9HH6-g3Md-0EmR6E"
                        device = "/dev/md0"     # Hint only

                        status = ["ALLOCATABLE"]
                        flags = []
                        dev_size = 3907049984   # 1,81936 Terabytes
                        pe_start = 384
                        pe_count = 476934       # 1,81936 Terabytes
                }
        }

        logical_volumes {

                pole_CRITICAL {
                        id = "gY3p79-yiko-MLre-lt2I-dcD6-1jBz-jL7YSC"
                        status = ["READ", "WRITE", "VISIBLE"]
                        flags = []
                        segment_count = 1

                        segment1 {
                                start_extent = 0
                                extent_count = 76800    # 300 Gigabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                                       stripes = [
                                        "pv0", 0
                                ]
                        }
                }

                pole_COMMON {
                        id = "PaN10A-kMJS-0Phw-rOdV-NEce-fT2x-5a9Orz"
                        status = ["READ", "WRITE", "VISIBLE"]
                        flags = []
                        segment_count = 1

                        segment1 {
                                start_extent = 0
                                extent_count = 348934   # 1,33108 Terabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv0", 128000
                                ]
                        }
                }

                backup_CRITICAL {
                        id = "chNcq1-7DCV-2xXa-i013-HwWL-nIP8-spzZpn"
                        status = ["READ", "WRITE"]
                        flags = []
                        segment_count = 1

                        segment1 {
                                start_extent = 0
                                extent_count = 51200    # 200 Gigabytes

                                type = "striped"
                                stripe_count = 1        # linear

                                stripes = [
                                        "pv0", 76800
                                ]
                        }
                }

                snapshot0 {
                        id = "CLabIT-f3uV-SsfK-RbAX-jezr-RWaB-K6YuQj"
                        status = ["READ", "WRITE", "VISIBLE"]
                        flags = []
                        segment_count = 1

                        
                        segment1 {
                                start_extent = 0
                                extent_count = 76800    # 300 Gigabytes

                                type = "snapshot"
                                chunk_size = 8
                                origin = "pole_CRITICAL"
                                cow_store = "backup_CRITICAL"
                        }
                }
        }
}